[ARC] Update ARC opcode table

[ARC] Update ARC opcode table

Update ARC opcode table by cleaning up invalid instructions, and fixing wrong encodings.

opcodes/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* arc-ext-tbl.h (bspeek): Remove it, added to main table.
	(bspop): Likewise.
	(modapp): Likewise.
	* arc-opc.c (RAD_CHK): Add.
	* arc-tbl.h: Regenerate.

include/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* include/opcode/arc.h (FASTMATH): Add.
	(SWITCH): Likewise.