mmips-cpus.def (74kc, [...]): Add PTF_AVOID_IMADD.

mmips-cpus.def (74kc, [...]): Add PTF_AVOID_IMADD.

2013-03-25  Steve Ellcey  <sellcey@mips.com>

	* config/mips/mmips-cpus.def (74kc, 74kf2_1, 74kf, 74kf, 74kf1_1,
	74kfx, 74kx, 74kf3_2): Add PTF_AVOID_IMADD.
	* config/mips/mips.c (mips_option_override): Set IMADD default.
	* config/mips/mips.h (PTF_AVOID_IMADD): New.
	(ISA_HAS_MADD_MSUB): Remove MIPS16 check.
	(GENERATE_MADD_MSUB): Remove TUNE_74K check, add MIPS16 check.
	* config/mips/mips.md (mimadd): New flag for integer madd/msub.
	* doc/invoke.texi (-mimadd/-mno-imadd): New.

From-SVN: r197072