avx, avx512f: use macro instead of typedef to create __m* types on ICC

Even if the destination types doesn't exist, ICC will actually issue a
diagnostic to tell you to use the one from the official header instead,
which will cause ICC to use instructions from that ISA extension even
if it isn't being targeted.

x86/avx.h

@@ -223,9 +223,15 @@ typedef union {
 #endif
 
 #if defined(SIMDE_X86_AVX_ENABLE_NATIVE_ALIASES)
-  typedef simde__m256 __m256;
-  typedef simde__m256i __m256i;
-  typedef simde__m256d __m256d;
+  #if !defined(HEDLEY_INTEL_VERSION)
+    typedef simde__m256 __m256;
+    typedef simde__m256i __m256i;
+    typedef simde__m256d __m256d;
+  #else
+    #define __m256 simde__m256
+    #define __m256i simde__m256i
+    #define __m256d simde__m256d
+  #endif
 #endif
 
 HEDLEY_STATIC_ASSERT(32 == sizeof(simde__m256), "simde__m256 size incorrect");

x86/avx512f.h

@@ -290,10 +290,15 @@ typedef union {
 #endif
 
 #if !defined(SIMDE_X86_AVX512F_NATIVE) && defined(SIMDE_ENABLE_NATIVE_ALIASES)
-  #define SIMDE_X86_AVX512F_ENABLE_NATIVE_ALIASES
-  typedef simde__m512 __m512;
-  typedef simde__m512i __m512i;
-  typedef simde__m512d __m512d;
+  #if !defined(HEDLEY_INTEL_VERSION)
+    typedef simde__m512 __m512;
+    typedef simde__m512i __m512i;
+    typedef simde__m512d __m512d;
+  #else
+    #define __m512 simde__m512
+    #define __m512i simde__m512i
+    #define __m512d simde__m512d
+  #endif
 #endif
 
 HEDLEY_STATIC_ASSERT(64 == sizeof(simde__m512), "simde__m512 size incorrect");