[clang] [clang][Driver][HIP] Add support for mixing AMDGCNSPIRV & concrete `offload-arch`s. (PR #113509)

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``````````bash
git-clang-format --diff 33363521ca24f912cc25530f6cecbca53acce8a3 4a18bbc256051f30805620f65a4db037ea2fe96c --extensions cpp -- clang/lib/Driver/Driver.cpp clang/lib/Driver/ToolChain.cpp clang/lib/Driver/ToolChains/HIPAMD.cpp clang/lib/Driver/ToolChains/HIPUtility.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 1590fbad5e..a24168306f 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -3473,9 +3473,10 @@ class OffloadingActionBuilder final {
       llvm::StringMap<bool> Features;
       // getHIPOffloadTargetTriple() is known to return valid value as it has
       // been called successfully in the CreateOffloadingDeviceToolChains().
-      auto T = (IdStr == "amdgcnspirv") ?
-          llvm::Triple("spirv64-amd-amdhsa") :
-          *getHIPOffloadTargetTriple(C.getDriver(), C.getInputArgs());
+      auto T =
+          (IdStr == "amdgcnspirv")
+              ? llvm::Triple("spirv64-amd-amdhsa")
+              : *getHIPOffloadTargetTriple(C.getDriver(), C.getInputArgs());
       auto ArchStr = parseTargetID(T, IdStr, &Features);
       if (!ArchStr) {
         C.getDriver().Diag(clang::diag::err_drv_bad_target_id) << IdStr;

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https://github.com/llvm/llvm-project/pull/113509