Update UART pin names & add MBED_CONF_TARGET_STDIO_UART overrides

Add standard pin-names validation script & tests

CMake: refactor Renesas targets ...

Refactor all Renesas targets to be CMake buildsystem targets. This removes
the need for checking MBED_TARGET_LABELS repeatedly and allows us to be
more flexible in the way we include MBED_TARGET source in the build.

A side effect of this is it will allow us to support custom targets
without breaking the build for 'standard' targets, as we use CMake's
standard mechanism for adding build rules to the build system, rather
than implementing our own layer of logic to exclude files not needed for
the target being built. Using this approach, if an MBED_TARGET is not
linked to using `target_link_libraries` its source files will not be
added to the build. This means custom target source can be added to the
user's application CMakeLists.txt without polluting the build system
when trying to compile for a standard MBED_TARGET.

Merge pull request #14035 from harmut01/remove_rz_targets ...

Remove unsupported Renesas target include files

Remove unsupported Renesas target include files ...

MBED_MBRZA1LU, MBED_MBRZA1H, and MBED_MBRZA2M are no longer supported by
Renesas.

CMake: Port Renesas targets to CMake ...

Add targets subdirectory to high level CMake configuration file and
create new configurations for MCUs and individual targets. Change the
interpreter in the ARM scatter file to armclang, which is required for
CMake. Remove private and public interfaces in emac target
configuration. Ensure that all targets build on the arm gcc compiler and
arm compiler.

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.

Add license notice to Arm copyrighted source files ...

Scancode found missing license notices in our source files. This commit
addresses those issues by adding an Apache-2.0 notice to source files
highlighted.

- Fix the CI build issue. ...

- Incorporate the review comment.

Fix the CI build issue

Fix missing mbed_get_a9_tick_irq in non-RTOS build

Change FPU enable timing in "SystemInit()"

Refactoring system clock driver

Removed clock mode decision of "SystemCoreClockUpdate()" ...

Since GPIO.PPR0 can not check clock mode, I changed it to set a fixed value for each board.

Fix the value of SystemCoreClock ...

The OS timer of RZ/A1 uses P0 clock, so until now it has been set the value of P0 clock in SystemCoreClock.
Changed the system clock value to set to SystemCoreClock.
Changed to refer to P0 clock macro instead of SystemCoreClock in OS timer processing.

Add PWM pin for GR-LYCHEE

GR_LYCHEE,RZ_A1H,VK_RZ_A1H: Update to fix ARMC6 build failures

Merge pull request #9571 from mprse/fix_9523_rtos_less_issue ...

Update to 2-region model for HEAP and Stack Memory

Add missing license description to RZ/A1 driver

Remove duplicated _mbed_user_setup_stackheap, __rt_lib_init definitions. ...

Few targets already used 2-region memory model.

Merge pull request #9163 from InfernoEmbedded/fix-8913-partner ...

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

Modify the definition as to whether RTOS is not present in sys.cpp.

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>

Modify IRQ handler processing without RTOS at Cortex-A IAR Compiler ...

In case of unusing RTOS, there is no processing against IRQ handler and it causes a linker error.
Therefore, I added this processing with WEAK attribute. Also I added cmain.S file at cmsis/TARGET_CORTEX_A folder.

Modify IRQ handler processing without RTOS at Cortex-A GCC Compiler ...

In case of unusing RTOS, IRQ handler executes "while(1)" and it causes a program freeze.
Therefore, I revised this processing.

Modify IRQ handler processing without RTOS at Cortex-A ARM Compiler ...

In case of unusing RTOS, IRQ handler executes "while(1)" and it causes a program freeze.
Therefore, I revised this processing. Also I added the heap setting processing and set the align to 8 byte.

Merge pull request #8374 from TomoYamanaka/improve_armcc_linkerscript ...

Renesas : Improve ARMCC linker script

Merge pull request #8234 from TomoYamanaka/modify_LPTicker ...

Renesas : Modify LPTicker driver

Improve ARMCC linker script for Renesas boards ...

For Arm toolchain build, Mbed 2(classic) programs occur an unexpected error if there is "#include "mem_XXXX.h"" in the script file.
It seems that the linker script can't find the include file because "mem_XXXX.h" file is not in the same path with the linker script.
(Refer to Issue #6975.)
To address this issue, I remove inclusion processing and define the related macros at ARMCC linker script file.

Renesas: Fix alignment of execute region to 8-byte boundary ...

--legacyalign, --no_legacyalign are deprecated from ARMC6 compiler, in order to
remove deprecated flags all linker files (GCC and IAR as well to have uniformity)
should strictly align to 8-byte boundary