[Committed] PR target/110787: Revert QImode offsets in {zero,sign}_extract.

[Committed] PR target/110787: Revert QImode offsets in {zero,sign}_extract.

My recent patch to use QImode for bit offsets in ZERO_EXTRACTs and
SIGN_EXTRACTs in the i386 backend shouldn't have resulted in any change
behaviour, but as reported by Rainer it produces a bootstrap failure in
gm2.  This reverts the problematic patch whilst we investigate the
underlying cause.

Committed as obvious.

2023-07-23  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog
	PR target/110787
	PR target/110790
	Revert patch.
	* config/i386/i386.md (extv<mode>): Use QImode for offsets.
	(extzv<mode>): Likewise.
	(insv<mode>): Likewise.
	(*testqi_ext_3): Likewise.
	(*btr<mode>_2): Likewise.
	(define_split): Likewise.
	(*btsq_imm): Likewise.
	(*btrq_imm): Likewise.
	(*btcq_imm): Likewise.
	(define_peephole2 x3): Likewise.
	(*bt<mode>): Likewise
	(*bt<mode>_mask): New define_insn_and_split.
	(*jcc_bt<mode>): Use QImode for offsets.
	(*jcc_bt<mode>_1): Delete obsolete pattern.
	(*jcc_bt<mode>_mask): Use QImode offsets.
	(*jcc_bt<mode>_mask_1): Likewise.
	(define_split): Likewise.
	(*bt<mode>_setcqi): Likewise.
	(*bt<mode>_setncqi): Likewise.
	(*bt<mode>_setnc<mode>): Likewise.
	(*bt<mode>_setncqi_2): Likewise.
	(*bt<mode>_setc<mode>_mask): New define_insn_and_split.
	(bmi2_bzhi_<mode>3): Use QImode offsets.
	(*bmi2_bzhi_<mode>3): Likewise.
	(*bmi2_bzhi_<mode>3_1): Likewise.
	(*bmi2_bzhi_<mode>3_1_ccz): Likewise.
	(@tbm_bextri_<mode>): Likewise.