i386.c (iy86_option_override_internal): Update processor_alias_table for missing...

i386.c (iy86_option_override_internal): Update processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags.

	* config/i386/i386.c (iy86_option_override_internal): Update
	processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags.  Add
	PTA_POPCNT to corei7 entry and remove PTA_SSE from athlon-4 entry.
	Do not enable SSE prefetch on non-SSE 3dNow! targets.  Enable
	TARGET_PRFCHW for TARGET_3DNOW targets.
	* config/i386/i386.md (prefetch): Enable for TARGET_PRFCHW instead
	of TARGET_3DNOW.
	(*prefetch_3dnow): Enable for TARGET_PRFCHW only.

From-SVN: r198942