* config/tc-mips.c (RELAX_ENCODE): Remove WARN argument.

	* config/tc-mips.c (RELAX_ENCODE): Remove WARN argument.
	(RELAX_FIRST, RELAX_SECOND): Turn into 8-bit quantities.
	(RELAX_USE_SECOND): Bump to 0x10000.
	(RELAX_SECOND_LONGER, RELAX_NOMACRO, RELAX_DELAY_SLOT): New flags.
	(mips_macro_warning): New variable.
	(md_assemble): Wrap macro expansion in macro_start() and macro_end().
	(s_cpload, s_cpsetup, s_cprestore, s_cpreturn): Likewise.
	(relax_close_frag): Set mips_macro_warning.first_frag.  Adjust use
	of RELAX_ENCODE.
	(append_insn): Update mips_macro_warning.sizes.
	(macro_start, macro_warning, macro_end): New functions.
	(macro_build): Don't emit warnings here.
	(macro_build_lui, md_estimate_size_before_relax): ...or here.
	(md_convert_frag): Check for cases where one macro alternative
	needs a warning and the other doesn't.  Emit a warning if the
	longer sequence was chosen.