* doc/c-mips.texi (-m{no-,}fix-vr4120): Renamed from

	* doc/c-mips.texi (-m{no-,}fix-vr4120): Renamed from
	-{no-}mfix-vr4122-bugs.
	* config/tc-mips.c (mips_fix_vr4120): Renamed from mips_fix_4122_bugs.
	(append_insn, mips_emit_delays): Update accordingly.
	(OPTION_FIX_VR4120, OPTION_NO_FIX_VR4120): Renamed from *VR4122.
	(md_longopts): Change -{no-,}mfix-vr4122-bugs to -m{no-,}fix-vr4120.
	(md_parse_option): Update after above changes.
	(md_show_usage): Add -mfix-vr4120.