Replace FIXME with NOTE in the comments.

Author: bader

clang/lib/Basic/Targets/SPIR.h

@@ -133,7 +133,7 @@ class LLVM_LIBRARY_VISIBILITY SPIRTargetInfo : public TargetInfo {
 
   void adjust(LangOptions &Opts) override {
     TargetInfo::adjust(Opts);
-    // FIXME: SYCL specification considers unannotated pointers and references
+    // NOTE: SYCL specification considers unannotated pointers and references
     // to be pointing to the generic address space. See section 5.9.3 of
     // SYCL 2020 specification.
     // Currently, there is no way of representing SYCL's default address space