[PATCH][AArch64][binutils] Add remainder of Em16 restrictions.

[Nick Clifton]

Hi Tamar,

> Ok for master? and for backport to binutils-2.31?

Approved - please apply - to both.

Cheers
  Nick

> opcodes/
> 2018-07-09  Tamar Christina  <tamar.christina@arm.com>
> 
> 	PR binutils/23192
> 	* aarch64-tbl.h (sqdmlal, sqdmlal2, smlsl, smlsl2, sqdmlsl, sqdmlsl2,
> 	mul, smull, smull2, sqdmull, sqdmull2, sqdmulh, sqrdmulh, mla, umlal,
> 	umlal2, mls, umlsl, umlsl2, umull, umull2, sqdmlal, sqdmlsl, sqdmull,
> 	sqdmulh, sqrdmulh): Use Em16.
> 
> gas/
> 2018-07-09  Tamar Christina  <tamar.christina@arm.com>
> 
> 	PR binutils/23192
> 	* testsuite/gas/aarch64/illegal-by-element.s: New.
> 	* testsuite/gas/aarch64/illegal-by-element.d: New.
> 	* testsuite/gas/aarch64/illegal-by-element.l: New.
>