FlashIAP: Add a ROM end macro

Improve efficiency and formatting of ITM output ...

SerialWireOutput was outputting 1 character per 32-bit write to the
ITM stimulus port. This is inefficient, and causes processing problems
with some viewers due to them receiving 3 NUL bytes between each
desired character.

Rework to allow us to be more efficient, and eliminate those NUL bytes:

* Retain existing mbed_itm_send() and clarify it's a single 32-bit write.
* Add new mbed_itm_send_block() that is appropriate for sending
  character data, and modify SerialWireOutput to use it.
* Move "wait for FIFO ready" check to before the write, rather than
  after.

One minor correction - FIFOREADY is a single bit of the register read.
Don't interpret reserved bits.

drivers: astyle update

Suppress warning for IAR compiler as well

Fix mbed_crc_ctor is missing in some MbedCRC constructor ...

This error leaves MbedCRC/_mode uninitialized and may cause mbed-os-tests-mbed_drivers-crc/
Test SD CRC polynomials failed.

Rename DEVICE_LOWPOWERTIMER to DEVICE_LPTICKER ...

That's to match DEVICE_USTICKER.

HAL CRC: Fix inverted CRC mode selection

HAL CRC: Add bit width parameter to crc_config_t

Add CRC configuration options to HAL API

Fix CRC class coding conventions

Adapt MbedCRC class to support Hardware CRC ...

- Move CRC polynomial enum into HAL layer, so it's accessible from platform
  implementations

- Add enum to CRC class to indicate which mode the CRC class should use:
  HARDWARE, TABLE, or BITWISE

- Add calls to HAL Hardware CRC API to each of the compute functions when the
  class is in HARDWARE mode.

- Add missing constructor call to template constructor, and remove const from
  delegating constructor.

Merge pull request #6791 from kjbracey-arm/fcntl ...

Add POSIX fcntl flag support

FlashIAP: Fix problem of programming source buffer not aligned to uint32_t

Add `is_blocking()` method to FileHandle ...

There was no way to check current blocking state, so no way to modify
and restore status.

Also have default FileHandle::set_blocking() used by real files return a
correct error code when asked for non-blocking, and success when asked
for blocking.

These were minor omissions that are required to implement POSIX fcntl
properly.

fixup! Add `is_blocking()` method to FileHandle

Eliminate complier warning and remove superfluous call to empty() ...

Appears when complied with -O3 optimization level

Compile: UARTSerial.cpp
../drivers/UARTSerial.cpp: In member function 'void mbed::UARTSerial::tx_irq()':
../drivers/UARTSerial.cpp:314:31: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized]
         SerialBase::_base_putc(data);

Merge pull request #6442 from deepikabhavnani/crc_test ...

Add test for MbedCRC.h

Merge pull request #6531 from SenRamakri/sen_DeprecatedFixes ...

Fix doxygen comments to reflect the deprecated functions

Fix deep sleep locking for Timeout class ...

Detach in the Timeout::handler so deep sleep is properly unlocked.

Fix doxygen comments to reflect the deprecated functions

Default constructor for template class should be part of header file

Merge pull request #6239 from bmcdonnell-ionx/interrupt-in-pin-mode ...

Interrupt in pin mode

Added SerialWireOutput to mbed namespace

linebreaks

Restore single-param InterruptIn ctor, to maintain binary compatibility (for Wi-Fi drivers). ...

Revert "simplify InterruptIn - default parameter instead of multiple constructors"; add comment.

This reverts commit d28dbf6.

Merge pull request #6149 from bmcdonnell-ionx/typos ...

Fix typos in the files

Merge pull request #6230 from bulislaw/system_reset ...

Add system_reset call

linebreak

add doxygen param info

simplify InterruptIn - default parameter instead of multiple constructors

factor out common function