[AArch64 Patch] Add support for CSDB

[Nick Clifton]

Hi James,

> opcodes/
> 
> 2018-01-09  James Greenhalgh  <james.greenhalgh@arm.com>
> 
> 	* aarch64-tbl.h (aarch64_opcode_table): Add "csdb".
> 	* aarch64-asm-2.c: Regenerate.
> 	* aarch64-dis-2.c: Regenerate.
> 	* aarch64-opc-2.c: Regenerate.
> 
> gas/
> 
> 2018-01-09  James Greenhalgh  <james.greenhalgh@arm.com>
> 
> 	* testsuite/gas/aarch64/system.d: Update expected results to expect
> 	CSDB.

Approved, applied and regenerated.  (Err, not in that order).

Cheers
  Nick