[ARC] Fix disassembler option.

This patch fixes:
- fpus and fpud are swaped.
- quarkse_em doesn't include FPX extensions.
- auto guessed opcode mechanism may ignore the option passed via -M<feature> option.

2016-11-29  Claudiu Zissulescu  <claziss@synopsys.com>

	* arc-dis.c (is_compatible_p): Remove function.
	(skip_this_opcode): Don't add any decoding class to decode list.
	Remove warning.
	(find_format_from_table): Go through all opcodes, and warn if we
	use a guessed mnemonic.

2016-11-29  Claudiu Zissulescu  <claziss@synopsys.com>

	* testsuite/binutils-all/arc/objdump.exp (Warning test): Update
4 files changed