Arm: Add support for missing CPUs

Arm: Add support for missing CPUs

This patch adds support for following CPUs:
Cortex-M35P, Cortex-A77, Cortex-A76AE.

Related specifications can be found at https://developer.arm.com/ip-products/processors.

gas/ChangeLog:

	* config/tc-arm.c: New entries for Cortex-M35P, Cortex-A77,
	and Cortex-A76AE.
	* doc/c-arm.texi: Document new processors.
	* testsuite/gas/arm/cpu-cortex-a76ae.d: New test.
	* testsuite/gas/arm/cpu-cortex-a77.d: New test.
	* testsuite/gas/arm/cpu-cortex-m35p.d: New test.

bfd/ChangeLog:

	* cpu-arm.c: New entries for Cortex-M35P, Cortex-A77, Cortex-A76AE.