[clang] [clang][CodeGen] Add query for a target's flat address space (PR #95728)

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:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 527e7328607ea0a55855e53a59c5030a7d07a554 2b500ad9ef2baf27da29146ddddb5a4123dcb75e -- clang/include/clang/Basic/TargetInfo.h clang/lib/Basic/Targets/AMDGPU.h clang/lib/Basic/Targets/SPIR.h
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index 8841ec5f91..a3b60db122 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -1767,9 +1767,7 @@ public:
   /// \returns Target specific flat ptr address space; a flat ptr is a ptr that
   /// can be casted to / from all other target address spaces. If the target
   /// exposes no such address space / does not care, we return 0.
-  virtual unsigned getFlatPtrAddressSpace() const {
-    return 0;
-  }
+  virtual unsigned getFlatPtrAddressSpace() const { return 0; }
 
   /// \returns If a target requires an address within a target specific address
   /// space \p AddressSpace to be converted in order to be used, then return the

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https://github.com/llvm/llvm-project/pull/95728