i386: Fix some ISA bit test in option_override

i386: Fix some ISA bit test in option_override

Adjust several new feature check in ix86_option_override_interal that
directly use TARGET_* instead of TARGET_*_P (opts->ix86_isa_flags)
to avoid cmdline option overrides target_attribute isa flag.

gcc/ChangeLog:

	* config/i386/i386-options.cc (ix86_option_override_internal):
	Use TARGET_*_P (opts->x_ix86_isa_flags*) instead of TARGET_*
	for UINTR, LAM and APX_F.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/apx-ccmp-2.c: Remove -mno-apxf in option.
	* gcc.target/i386/funcspec-56.inc: Drop uintr tests.
	* gcc.target/i386/funcspec-6.c: Add uintr tests.