Remove all source files exclusive to Arm Compiler and IAR (#159) ...

* Remove all source files exclusive to Arm Compiler and IAR

* Also remove 'TOOLCHAIN_ARM'

* Remove targets.json entries for ARM and IAR

GPIO: Use uintptr_t for gpio_irq_api context ...

The HAL gpio_irq_api stores object IDs, which serve as a form of context
for the dispatch of the interrupt handler in the drivers level
InterruptIn Class. The way this is achieved is that the InterruptIn
Class casts its address to uint32_t, which is stored as the ID.
This results in compilation failure when the size of an object pointer
is greater than uint32_t, for example when building on a PC for unit
testing.

In order to allow Unit Testing of the InterruptIn Class, we replace the
use of uint32_t with uintptr_t (type capable of holding a pointer),
which allows portability and expresses intentions more clearly.
In aid of this latter goal, we also replace the use of the name "id"
with "context", to improve clarity - these are addresses of the context
related to that callback.

Update UART pin names & add MBED_CONF_TARGET_STDIO_UART overrides

Add standard pin-names validation script & tests

Merge pull request #14306 from hugueskamba/hk_cmake_create_cmsis_cortex_libs ...

CMake: Create CMSIS library targets to remove dependency on MBED_TARGET_LABELS

Create FLASH CMSIS ALGO target to remove dependency on MBED_TARGET_LABELS ...

This goes towards eventually removing reliance on targets.json to specify
the requirements of Mbed targets.

CMake: Create CMSIS library targets to remove dependency on MBED_TARGET_LABELS ...

This goes towards eventually removing reliance on targets.json to specify
the requirements of Mbed targets.

Analog Devices: fix CMakeLists names

CMake Analog devices: fix linking to the main family target

CMake Analog Devices: fix names after refactor

Analog Devices: refactor CMake targets

CMake: Fix Analog Devices targets support ...

* Fix CMake syntax errors
* Fix indentation
* List directories and source files in alpahabetical order with spaces between files located in different directories
* Create STARTUP_FILE variable as done for all other targets

ADUCM3029: remove flag that is already set in core CMake

Update interpreter program used in ARM scatter file ...

Change interpreter program from armcc to armclang. Pass it different
optional arguments: specify the target compiler and core core type.

Add CMake support for all Renesas targets ...

Add configuration files for targets and individual MCUs. Add include
paths and sources to mbed-core link library and specify linker and
startup scripts.

Add SPDX license identifier to Arm files ...

Add license identifier to files which Arm owns the copyright to,
and contain either BSD-3 or Apache-2.0 licenses. This is to address
license errors raised by scancode analysis.

stack: armc: Workaround config passing bug ...

Workaround a bug where the boot stack size configuration option is not
passed on to armlink, the Arm Compiler's linker. Prefer
MBED_CONF_TARGET_BOOT_STACK_SIZE if present, as this is what the
configuration system should provide. Fall back to MBED_BOOT_STACK_SIZE
if MBED_CONF_TARGET_BOOT_STACK_SIZE is not defined, as in the case of
buggy tools. If both MBED_CONF_TARGET_BOOT_STACK_SIZE and
MBED_BOOT_STACK_SIZE are not defined, then we fall back to a hard-coded
value provided by the linkerscript. See
https://github.com/ARMmbed/mbed-os/issues/13474 for more information.

Use boot stack size from config system ...

To allow overriding of the boot stack size from the Mbed configuration
system, consistently use MBED_CONF_TARGET_BOOT_STACK_SIZE rather than
MBED_BOOT_STACK_SIZE.

Fixes #10319

ad4050lz: fix gcc copy table and zero table missing

Analog devices: overwrite cmsis startup ...

define __PROGRAM_START so we use own startup as AD had it defined, this fixes the conflicts with
CMSIS_5 update (they introduced low level init).

Revert "Use cmsis gcc types instead of own" ...

This reverts commit 606ccbc.

Use cmsis gcc types instead of own ...

This caused a conflict. As CMSIS update introduced low level init, lets use the types
from CMSIS. We could potentionally use __cmsis_start but as I saw for some targets,
the init routine is slightly different. So rather keep what we have in targets, and just
use types already defined in CMSIS.

EV_COG_AD4050LZ: keep IVT_NAME/blank_checksum symbols in LTO builds ...

Add a "used" attribute to IVT_NAME/blank_checksum
to fix ARMC6 build with the "-flto" flag. (Error: L6236E: No section matches
selector - no section to be FIRST/LAST. )

This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.

EV_COG_AD3029LZ: keep IVT_NAME/blank_checksum symbols in LTO builds ...

Add a "used" attribute to IVT_NAME/blank_checksum
to fix ARMC6 build with the "-flto" flag. (Error: L6236E: No section matches
selector - no section to be FIRST/LAST. )

This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.

Add HAL API for spi pinmap ...

Add the functions to get spi pinmaps to all targets.

Add HAL API for serial pinmap ...

Add the functions serial_tx_pinmap, serial_rx_pinmap, serial_cts_pinmap
and serial_rts_pinmap to all targets.

Add HAL API for i2c pinmap ...

Add the functions i2c_master_sda_pinmap, i2c_master_scl_pinmap,
i2c_slave_sda_pinmap and i2c_slave_scl_pinmap to all targets.

Add HAL API for analog in pinmap ...

Add the function analogin_pinmap to all targets.

[Analog_Devices] Support boot stack size configuration option

Don't use define checks on DEVICE_FOO macros (partner code) ...

The DEVICE_FOO macros are always defined (either 0 or 1).

This patch replaces any instances of a define check on a DEVICE_FOO
macro with value test instead.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>