[ARC] ISA alignment.

[ARC] ISA alignment.

include/
2016-09-26  Claudiu Zissulescu  <claziss@synopsys.com>

	* opcode/arc.h (insn_class_t): Add two new classes.

opcodes/
2016-09-26  Claudiu Zissulescu  <claziss@synopsys.com>

	* arc-ext-tbl.h (EXTINSN2OPF): Define.
	(EXTINSN2OP): Use EXTINSN2OPF.
	(bspeekm, bspop, modapp): New extension instructions.
	* arc-opc.c (F_DNZ_ND): Define.
	(F_DNZ_D): Likewise.
	(F_SIZEB1): Changed.
	(C_DNZ_D): Define.
	(C_HARD): Changed.
	* arc-tbl.h (dbnz): New instruction.
	(prealloc): Allow it for ARC EM.
	(xbfu): Likewise.