* config/i386/core2.md: New DFA model for Core 2 and Core i7.
	* config/i386/i386.c (ix86_option_override_internal): Update entries
	for Core 2 and Core i7.
	(ix86_issue_rate): Set issue rate to 3 [be realistic].
	* config/i386/i386.md: Include "core2.md".
	(define_attr cpu): Add "corei7".

From-SVN: r167375