x86: yet more PR target/100711-like splitting

Following two-operand bitwise operations, add another splitter to also
deal with not followed by broadcast all on its own, which can be
expressed as simple embedded broadcast instead once a broadcast operand
is actually permitted in the respective insn. While there also permit
a broadcast operand in the corresponding expander.

gcc/

	PR target/100711
	* config/i386/sse.md: New splitters to simplify
	not;vec_duplicate as a singular vpternlog.
	(one_cmpl<mode>2): Allow broadcast for operand 1.
	(<mask_codefor>one_cmpl<mode>2<mask_name>): Likewise.

gcc/testsuite/

	PR target/100711
	* gcc.target/i386/pr100711-6.c: New test.

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