Don't include <immintrin.h> if it is not needed

Some environments provide <wmmintrin.h> but not <immintrin.h>

src/libsodium/crypto_aead/aes256gcm/aesni/aead_aes256gcm_aesni.c

@@ -15,14 +15,15 @@
 #include "runtime.h"
 #include "utils.h"
 
-#if defined(HAVE_WMMINTRIN_H) || \
+#if (defined(HAVE_TMMINTRIN_H) && defined(HAVE_WMMINTRIN_H)) || \
     (defined(_MSC_VER) && _MSC_VER >= 1600 && (defined(_M_X64) || defined(_M_AMD64) || defined(_M_IX86)))
 
 #pragma GCC target("ssse3")
 #pragma GCC target("aes")
 #pragma GCC target("pclmul")
 
-#include <immintrin.h>
+#include <tmmintrin.h>
+#include <wmmintrin.h>
 
 #ifndef ENOSYS
 # define ENOSYS ENXIO