* config/tc-mips.c (mips_64): Remove.

	* config/tc-mips.c (mips_64): Remove.
	(mips_target_format): Move downwards in file, use HAVE_64BIT_OBJECTS
	in it.
	(mips_abi_level, mips_abi): New enum.
	(mips_32bit_abi): Remove.
	(HAVE*PRS): Use mips_abi instead of mips_32bit_abi.
	(HAVE_NEWABI): New define.
	(HAVE_64BIT_OBJECTS): New define.
	(HAVE_32BIT_ADDRESSES): Don't return true for 64bit objects.
	(HAVE_64BIT_ADDRESSES): New define, inverse of HAVE_32BIT_ADDRESSES.
	(support_64bit_objects): New prototype.
	(md_begin): Use mips_abi instead of mips_32bit_abi. Don't write
	.reginfo section for n32, use .MIPS.options instead.
	(support_64bit_objects): New function, code from md_parse_option.
	(md_longopts): Add -n32 option.
	(md_parse_option): Use mips_abi instead of mips_32bit_abi/mips64.
	Add -n32 option. Protect with OBJ_ELF.
	(s_mipsset): Use mips_abi instead of mips_32bit_abi.
	(mips_elf_final_processing): Likewise. Don't write .reginfo section
	for n32, use .MIPS.options instead.