[PATCH][AArch64][binutils] Fix SBO bit in disassembly mask for ldrah.

[Nick Clifton]

Hi Tamar,
 
> opcodes/
> 2018-06-29  Tamar Christina  <tamar.christina@arm.com>
> 
> 	PR binutils/23242
> 	* aarch64-tbl.h (ldarh): Fix disassembly mask.

Approved - please apply.

Cheers
  Nick