AVX512F: Add missing macro for mask(z?)_scalf_s[sd] [PR 105339]

AVX512F: Add missing macro for mask(z?)_scalf_s[sd] [PR 105339]

Add missing macro under O0 and adjust macro format for scalf
intrinsics.

gcc/ChangeLog:

	PR target/105339
	* config/i386/avx512fintrin.h (_mm512_scalef_round_pd):
	Add parentheses for parameters and djust format.
	(_mm512_mask_scalef_round_pd): Ditto.
	(_mm512_maskz_scalef_round_pd): Ditto.
	(_mm512_scalef_round_ps): Ditto.
	(_mm512_mask_scalef_round_ps): Ditto.
	(_mm512_maskz_scalef_round_ps): Ditto.
	(_mm_scalef_round_sd): Use _mm_undefined_pd.
	(_mm_scalef_round_ss): Use _mm_undefined_ps.
	(_mm_mask_scalef_round_sd): New macro.
	(_mm_mask_scalef_round_ss): Ditto.
	(_mm_maskz_scalef_round_sd): Ditto.
	(_mm_maskz_scalef_round_ss): Ditto.

gcc/testsuite/ChangeLog:

	PR target/105339
	* gcc.target/i386/sse-14.c: Add tests for new macro.