[PATCH][GAS][AArch64] Fix MSR/MRS Encoding and Decoding

[Tamar Christina]

Hi All,

This patch corrects the opcode and mask for the MSR and MRS instructions.
These two instructions have bit 20 set but the current CORE_INSN do not
correctly have bit 20 set causing invalid encoding and decoding.

Cross compiled and regtested:

 * aarch64-none-elf
 * aarch64_be-none-elf

and no regressions.

Bootstrapped and regtested on:

 * aarch64-none-elf
 * aarch64-none-elf (32 bit schroot)

and no regressions.

Ok for master?

Thanks,
Tamar

opcodes/
2018-03-08  Tamar Christina  <tamar.christina@arm.com>

	* aarch64-dis-2.c: Regenerate.
	* aarch64-tbl.h (aarch64_opcode_table): Fix MSR and MRS encoding.

gas/
2018-03-08  Tamar Christina  <tamar.christina@arm.com>

	* testsuite/gas/aarch64/sysreg-1.d: Update encodings.

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