Remove the max version limitation for clang workaround

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/sha512.c b/library/sha512.c
index a7b8c74..dc44797 100644
--- a/library/sha512.c
+++ b/library/sha512.c
@@ -23,7 +23,7 @@
  */
 
 #if defined(__aarch64__) && !defined(__ARM_FEATURE_SHA512) && \
-    defined(__clang__) &&  __clang_major__ < 18 && __clang_major__ > 7
+    defined(__clang__) && __clang_major__ > 7
 /* TODO: Re-consider above after https://reviews.llvm.org/D131064 merged.
  *
  * The intrinsic declaration are guarded by predefined ACLE macros in clang: