[PATCH][AArch64][GAS][Binutils] Fix sqrdml(a|s)h instructions

[Tamar Christina]

Hi All,

This fixes the mask for the sqrdml(a|s)h instructions.
Rn is supposed to have a 5 bit range but instead was given 4 bits
causing these instructions to disassemble as unknown instructions.

Regtested on aarch64-none-elf and no issues.

Ok for master? And also permission to backport to 2.30 branch?

opcodes/
2018-04-25  Tamar Christina  <tamar.christina@arm.com>

	* aarch64-tbl.h (sqrdmlah, sqrdmlsh): Fix masks.

gas/
2018-04-25  Tamar Christina  <tamar.christina@arm.com>

	* testsuite/gas/aarch64/rdma.s: Test for larger register numbers.
	* testsuite/gas/aarch64/rdma.d: Update results.
	* testsuite/gas/aarch64/rdma-directive.d: Likewise.

Thanks,
Tamar

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