i386: Change mnemonics from TCVTROWPS2PBF16[H,L] to TCVTROWPS2BF16[H,L]

In ISE056, the mnemonics for TCVTROWPS2PBF16[H,L] has been changed to
TCVTROWPS2BF16[H,L].

gcc/ChangeLog:

	* config/i386/amxavx512intrin.h
	(_tile_cvtrowps2pbf16h_internal): Rename to...
	(_tile_cvtrowps2bf16h_internal): ...this.
	(_tile_cvtrowps2pbf16hi_internal): Rename to...
	(_tile_cvtrowps2bf16hi_internal): ...this.
	(_tile_cvtrowps2pbf16l_internal): Rename to...
	(_tile_cvtrowps2bf16l_internal): ...this.
	(_tile_cvtrowps2pbf16li_internal): Rename to...
	(_tile_cvtrowps2bf16li_internal): ...this.
	(_tile_cvtrowps2pbf16h): Rename to...
	(_tile_cvtrowps2bf16h): ...this.
	(_tile_cvtrowps2pbf16hi): Rename to...
	(_tile_cvtrowps2bf16hi): ...this.
	(_tile_cvtrowps2pbf16l): Rename to...
	(_tile_cvtrowps2bf16l): ...this.
	(_tile_cvtrowps2pbf16li): Rename to...
	(_tile_cvtrowps2bf16li): ...this.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/amxavx512-asmatt-1.c: Adjust intrin call.
	* gcc.target/i386/amxavx512-asmintel-1.c: Ditto.
	* gcc.target/i386/amxavx512-cvtrowps2pbf16-2.c: Rename to...
	* gcc.target/i386/amxavx512-cvtrowps2bf16-2.c: ...this. Rename
	test functions.