i386: Fix up mode iterators that weren't expanded [PR106721]

i386: Fix up mode iterators that weren't expanded [PR106721]

Currently, when md file reader sees <something> and something is valid mode
(or code) attribute but which doesn't include case for the current mode
(or code), it just keeps the <something> untouched.
I went through all cases matching <[a-zA-Z] in tmp-mddump.md after make mddump.
Most of the cases were related to the recent V*BF mode additions, some
to V*HF mode too, and there was one typo.

2022-08-24  Jakub Jelinek  <jakub@redhat.com>

	PR target/106721
	* config/i386/sse.md (shuffletype): Add V32BF, V16BF and V8BF entries.
	Change V32HF, V16HF and V8HF entries from "f" to "i".
	(iptr): Add V32BF, V16BF, V8BF and BF entries.
	(i128vldq): Add V16HF and V16BF entries.
	(avx512er_vmrcp28<mode><mask_name><round_saeonly_name>): Fix typo,
	mask_opernad3 -> mask_operand3.

	* gcc.target/i386/avx512vl-pr106721.c: New test.