toplev.c (display_target_options): Avoid unused variable warning if TARGET_SWITCHES and TARGET_OPTIONS are both...

	* toplev.c (display_target_options): Avoid unused variable warning if
	TARGET_SWITCHES and TARGET_OPTIONS are both undefined.
	* config/mips/mips.c (mips_arch_string, mips_tune_string): Make static.
	(mips_isa_string, mips_abi_string, mips_fix_vr4130_string): Delete.
	(mips_isa): Initialize to MIPS_ABI_DEFAULT.
	(mips_isa_info): New variable.
	(mips_parse_cpu): Remove the first argument and leave the caller
	to report errors.
	(TARGET_HANDLE_OPTION): Override default.
	(mips_handle_option): New function.  Move option validation code from...
	(override_options): ...here.  Update calls to mips_parse_cpu.
	* config/mips/mips.h (mips_arch_string, mips_tune_string)
	(mips_isa_string, mips_abi_string, TARGET_OPTIONS)
	(SUBTARGET_TARGET_OPTIONS): Delete.
	* config/mips/mips.opt (mabi=, march=, mflush-func=, mips)
	(mno-flush-func, mtune=): New options.

From-SVN: r96536