[ARC] Prefer NOP instead of MOV 0,0

[ARC] Prefer NOP instead of MOV 0,0

NOP and MOV 0,0 are having the same encoding. As MOV mnemonic is
located before NOP in the instruction table, the disassembler prints
MOV 0,0 for NOP. Reorder the instructions such that NOP is first.

gas/
2017-04-25  Claudiu Zissulescu  <claziss@synopsys.com>

	* testsuite/gas/arc/b.d: Update test.
	* testsuite/gas/arc/noargs_hs.d: Likewise.

opcode/
2017-04-25  Claudiu Zissulescu  <claziss@synopsys.com>

	* arc-tbl.h: Reorder NOP entry to be before MOV instructions.