Convert all HAVE_<name> SIMD gates to HAVE_SIMD(<name>)

The original names no longer exist, and the new ones will need to be
selectable based on the current compilation target.

Sponsored-by: TrueNAS
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes #18285

module/zcommon/zfs_fletcher_intel.c

@@ -41,7 +41,7 @@
  * SOFTWARE.
  */
 
-#if defined(HAVE_AVX) && defined(HAVE_AVX2)
+#if HAVE_SIMD(AVX) && HAVE_SIMD(AVX2)
 
 #include <sys/spa_checksum.h>
 #include <sys/string.h>
@@ -164,4 +164,4 @@ const fletcher_4_ops_t fletcher_4_avx2_ops = {
 	.name = "avx2"
 };
 
-#endif /* defined(HAVE_AVX) && defined(HAVE_AVX2) */
+#endif /* HAVE_SIMD(AVX) && HAVE_SIMD(AVX2) */