[SYCL][Sema] Disable depreacate warning for sycl

Workaround to disable new deprecated warning for sycl before we can
clean up and re-enable it later.

Author: sys-ce-bb

clang/lib/Sema/SemaAvailability.cpp

@@ -544,7 +544,8 @@ static void DoEmitAvailabilityWarning(Sema &S, AvailabilityResult K,
       S.getTopMostPointOfInstantiation(ReferringDecl);
   bool ShouldAllowWarningInSystemHeader =
       InstantiationLoc != Loc &&
-      !S.getSourceManager().isInSystemHeader(InstantiationLoc);
+      !S.getSourceManager().isInSystemHeader(InstantiationLoc) &&
+      !S.getLangOpts().SYCLIsDevice && !S.getLangOpts().SYCLIsHost;
   struct AllowWarningInSystemHeaders {
     AllowWarningInSystemHeaders(DiagnosticsEngine &E,
                                 bool AllowWarningInSystemHeaders)