Remove XFAIL for reversebit.64 when targeting vulkan (#1240)

The original issue was fixed, so now we can remove the xfail

Author: joaosaffran

test/Feature/HLSLLib/reversebits.64.test

@@ -79,8 +79,8 @@ DescriptorSets:
 ...
 #--- end
 
-# Bug https://github.com/llvm/llvm-project/issues/197810
-# XFAIL: Clang && Vulkan
+# Bug https://github.com/llvm/offload-test-suite/issues/1241
+# XFAIL: QC && Vulkan && Clang
 
 # REQUIRES: Int64
 # RUN: split-file %s %t