This adds support for the Arm Cortex-R82 CPU in AArch64 GAS. For more
information about this processor, see [0].

Testing:
 * Manually verified new -mcpu option works as expected.
 * Regression tested an x64 -> aarch64-none-elf cross.

[0] : https://developer.arm.com/ip-products/processors/cortex-r/cortex-r82

---

gas/ChangeLog:

2020-09-04  Alex Coplan  <alex.coplan@arm.com>

	* config/tc-aarch64.c (aarch64_cpus): Add Cortex-R82.
	* doc/c-aarch64.texi: Document -mcpu=cortex-r82.
---
 gas/config/tc-aarch64.c | 1 +
 gas/doc/c-aarch64.texi  | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)