i386: Add AMX-TILE dependency for AMX related ISAs

gcc/ChangeLog:

	* common/config/i386/i386-common.cc
	(OPTION_MASK_ISA2_AMX_INT8_SET): Add AMX-TILE dependency.
	(OPTION_MASK_ISA2_AMX_BF16_SET): Ditto.
	(OPTION_MASK_ISA2_AMX_FP16_SET): Ditto.
	(OPTION_MASK_ISA2_AMX_TILE_UNSET): Disable AMX_{INT8,
	BF16, FP16} when disable AMX_TILE.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/amxbf16-dpbf16ps-2.c: Remove -amx-tile.
	* gcc.target/i386/amxfp16-dpfp16ps-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbssd-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbsud-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbusd-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbuud-2.c: Ditto.