[Arm] Add support for missing CPUs

[Arm] Add support for missing CPUs

This patch adds '-mcpu' options for following CPUs:
Cortex-M35P, Cortex-A77, Cortex-A76AE.

Related specifications are as following:
https://developer.arm.com/ip-products/processors/cortex-m
https://developer.arm.com/ip-products/processors/cortex-a

2019-08-23  Dennis Zhang  <dennis.zhang@arm.com>

	* config/arm/arm-cpus.in (cortex-m35p): New entry.
	(cortex-a76ae): Likewise.
	(cortex-a77): Likewise
	* config/arm/arm-tables.opt: Regenerate.
	* config/arm/arm-tune.md: Likewise.
	* doc/invoke.texi (ARM Options): Document cortex-m35p, cortx-a76ae,
	cortex-a77 CPU options.

From-SVN: r274845