[clang] [clang] Fix device_kernel attribute crash on unsupported targets when not using AMDGPU spelling (PR #161687)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,c -- clang/lib/Sema/SemaDeclAttr.cpp clang/lib/Sema/SemaType.cpp clang/test/Sema/callingconv.c
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 3ae36d44f..8e51faa98 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -5204,7 +5204,8 @@ static void handleCallConvAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
 static void handleDeviceKernelAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
   const auto *FD = dyn_cast_or_null<FunctionDecl>(D);
   bool IsFunctionTemplate = FD && FD->getDescribedFunctionTemplate();
-  if (!S.getLangOpts().OpenCL && !S.getLangOpts().CUDA && !DeviceKernelAttr::isAMDGPUSpelling(AL)) {
+  if (!S.getLangOpts().OpenCL && !S.getLangOpts().CUDA &&
+      !DeviceKernelAttr::isAMDGPUSpelling(AL)) {
     // This is already diagnosed for AMDGPU in getCCForDeclaratorChunk
     S.Diag(AL.getLoc(), diag::warn_cconv_unsupported)
         << AL << (int)Sema::CallingConventionIgnoredReason::ForThisTarget;

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https://github.com/llvm/llvm-project/pull/161687