i386/testsuite: Fix non unique name tests

i386/testsuite: Fix non unique name tests

After r16-3651, compare_tests script will explicitly mention those
tests have the same name. This helps us review all the tests we have.

Among them, most of them are unintentional typos (e.g., keep testing
the same vector size for scan-assembler). Fix them through this commit.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx512bw-vpackssdw-1.c:
	Fix xmm/ymm mask tests.
	* gcc.target/i386/avx512bw-vpacksswb-1.c: Ditto.
	* gcc.target/i386/avx512bw-vpackusdw-1.c: Ditto.
	* gcc.target/i386/avx512bw-vpackuswb-1.c: Ditto.
	* gcc.target/i386/avx512bw-vpermw-1.c: Test xmm.
	* gcc.target/i386/avx512bw-vpmulhw-1.c:
	Fix xmm/ymm mask tests.
	* gcc.target/i386/avx512f-vec-init.c: Remove duplicate test.
	* gcc.target/i386/avx512fp16-13.c: Fix test for aligned load.
	* gcc.target/i386/avx512fp16-conjugation-1.c: Revise the test
	to test more precisely on masks.
	* gcc.target/i386/avx512fp16vl-conjugation-1.c: Ditto.
	* gcc.target/i386/avx512vbmi-vpermb-1.c: Test xmm.
	* gcc.target/i386/avx512vl-vcvtpd2ps-1.c: Fix scan asm.
	* gcc.target/i386/avx512vl-vinsert-1.c: Fix typo.
	* gcc.target/i386/avx512vl-vpmulld-1.c:
	Fix xmm/ymm mask tests.
	* gcc.target/i386/avx512vl-vptestmd-1.c: Ditto.
	* gcc.target/i386/bitwise_mask_op-1.c: Fix typo.
	* gcc.target/i386/cond_op_shift_q-1.c: Test both vpsra{,v}
	and vpsll{,v}.
	* gcc.target/i386/cond_op_shift_ud-1.c: Ditto.
	* gcc.target/i386/cond_op_shift_uq-1.c: Ditto.
	* gcc.target/i386/memcpy-pr95886.c: Fix the wrong const int.
	* gcc.target/i386/part-vect-sqrtph-1.c: Remove duplicate test.
	* gcc.target/i386/pr107432-7.c: Test vpmov{s,z}xbw instead of
	vpmov{s,z}xbd.
	* gcc.target/i386/pr88828-0.c: Fix pblendw scan asm.