Rename ufix_trunc/ufloat* patterns to fixuns_trunc/floatuns* to align with standard...

Rename ufix_trunc/ufloat* patterns to fixuns_trunc/floatuns* to align with standard pattern name.

There's some typo for the standard pattern name for unsigned_{float,fix},
it should be floatunsmn2/fixuns_truncmn2, not ufloatmn2/ufix_truncmn2
in current trunk, the patch fix the typo, also change all though
ufix_trunc/ufloat patterns.

Also vcvttps2udq is available under AVX512VL, so it can be generated
directly instead of being emulated via vcvttps2dq.

gcc/ChangeLog:

	PR target/85048
	* config/i386/i386-builtin.def (BDESC): Adjust icode name from
	ufloat/ufix to floatuns/fixuns.
	* config/i386/i386-expand.cc
	(ix86_expand_vector_convert_uns_vsivsf): Adjust comments.
	* config/i386/sse.md
	(ufloat<sseintvecmodelower><mode>2<mask_name><round_name>):
	Renamed	to ..
	(<mask_codefor>floatuns<sseintvecmodelower><mode>2<mask_name><round_name>):.. this.
	(<mask_codefor><avx512>_ufix_notrunc<sf2simodelower><mode><mask_name><round_name>):
	Renamed to ..
	(<mask_codefor><avx512>_fixuns_notrunc<sf2simodelower><mode><mask_name><round_name>):
	.. this.
	(<fixsuffix>fix_truncv16sfv16si2<mask_name><round_saeonly_name>):
	Renamed to ..
	(fix<fixunssuffix>_truncv16sfv16si2<mask_name><round_saeonly_name>):.. this.
	(ufloat<si2dfmodelower><mode>2<mask_name>): Renamed to ..
	(floatuns<si2dfmodelower><mode>2<mask_name>): .. this.
	(ufloatv2siv2df2<mask_name>): Renamed to ..
	(<mask_codefor>floatunsv2siv2df2<mask_name>): .. this.
	(ufix_notrunc<mode><si2dfmodelower>2<mask_name><round_name>):
	Renamed to ..
	(fixuns_notrunc<mode><si2dfmodelower>2<mask_name><round_name>):
	.. this.
	(ufix_notruncv2dfv2si2): Renamed to ..
	(fixuns_notruncv2dfv2si2):.. this.
	(ufix_notruncv2dfv2si2_mask): Renamed to ..
	(fixuns_notruncv2dfv2si2_mask): .. this.
	(*ufix_notruncv2dfv2si2_mask_1): Renamed to ..
	(*fixuns_notruncv2dfv2si2_mask_1): .. this.
	(ufix_truncv2dfv2si2): Renamed to ..
	(*fixuns_truncv2dfv2si2): .. this.
	(ufix_truncv2dfv2si2_mask): Renamed to ..
	(fixuns_truncv2dfv2si2_mask): .. this.
	(*ufix_truncv2dfv2si2_mask_1): Renamed to ..
	(*fixuns_truncv2dfv2si2_mask_1): .. this.
	(ufix_truncv4dfv4si2<mask_name>): Renamed to ..
	(fixuns_truncv4dfv4si2<mask_name>): .. this.
	(ufix_notrunc<mode><sseintvecmodelower>2<mask_name><round_name>):
	Renamed to ..
	(fixuns_notrunc<mode><sseintvecmodelower>2<mask_name><round_name>):
	.. this.
	(ufix_trunc<mode><sseintvecmodelower>2<mask_name>): Renamed to ..
	(<mask_codefor>fixuns_trunc<mode><sseintvecmodelower>2<mask_name>):
	.. this.

gcc/testsuite/ChangeLog:

	* g++.target/i386/pr85048.C: New test.