Now that we have machinery in testcase.mk to set vector length dependent
flags for AVX512 tests, let's avoid using a pragma to enable AVX512VL
insns for the compiler. This way, correct settings are in place from the
very beginning of compilation.

No change to the generated test blobs, and hence no functional change.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/tools/tests/x86_emulator/simd.h
+++ b/tools/tests/x86_emulator/simd.h
@@ -215,10 +215,6 @@ DECL_OCTET(half);
 # define __builtin_ia32_shuf_i32x4_512_mask __builtin_ia32_shuf_i32x4_mask
 # define __builtin_ia32_shuf_i64x2_512_mask __builtin_ia32_shuf_i64x2_mask
 
-# if VEC_SIZE > ELEM_SIZE && (defined(VEC_MAX) ? VEC_MAX : VEC_SIZE) < 64
-#  pragma GCC target ( "avx512vl" )
-# endif
-
 # define REN(insn, old, new)                     \
     asm ( ".macro v" #insn #old " o:vararg \n\t" \
           "v" #insn #new " \\o             \n\t" \
--- a/tools/tests/x86_emulator/testcase.mk
+++ b/tools/tests/x86_emulator/testcase.mk
@@ -7,8 +7,8 @@ $(call cc-options-add,CFLAGS,CC,$(EMBEDD
 ifneq ($(filter -mavx512%,$($(TESTCASE)-cflags)),)
 
 cflags-vsz64 :=
-cflags-vsz32 := -mprefer-vector-width=256
-cflags-vsz16 := -mprefer-vector-width=128
+cflags-vsz32 := -mavx512vl -mprefer-vector-width=256
+cflags-vsz16 := -mavx512vl -mprefer-vector-width=128
 # Scalar tests don't set VEC_SIZE (and VEC_MAX is used by S/G ones only)
 cflags-vsz   := -mprefer-vector-width=128