Enable diagnostic only for SYCL

ESIMD doesn't yet support function pointers properly.

Author: Fznamznon

clang/lib/Sema/SemaOverload.cpp

@@ -10264,7 +10264,8 @@ static bool checkAddressOfFunctionIsAvailable(Sema &S, const FunctionDecl *FD,
       S.getLangOpts().SYCLAllowFuncPtr) {
     if (!FD->hasAttr<SYCLDeviceIndirectlyCallableAttr>()) {
       S.SYCLDiagIfDeviceCode(Loc,
-                             diag::err_sycl_taking_address_of_wrong_function);
+                             diag::err_sycl_taking_address_of_wrong_function,
+                             Sema::DeviceDiagnosticReason::Sycl);
     }
   }