[clang] [clang][sema] Fix -Wunused-function on target_version'd file-scope Fn's (PR #81167)

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``````````bash
git-clang-format --diff ff8c865838b46d0202963b816fbed50aaf96a7f4 96e3020eaa69f7f14b67617a250df3041cc1996b -- clang/include/clang/AST/Decl.h clang/lib/AST/Decl.cpp clang/lib/Sema/Sema.cpp clang/test/SemaCXX/warn-unused-filescoped.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index 58cbcc30e0..cfb653e665 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -1393,7 +1393,8 @@ void Sema::ActOnEndOfTranslationUnit() {
               Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
                   << /*function=*/0 << DiagD << DiagRange;
           }
-        } else if (!FD->isTargetMultiVersion() || FD->isTargetMultiVersionDefault()) {
+        } else if (!FD->isTargetMultiVersion() ||
+                   FD->isTargetMultiVersionDefault()) {
           if (FD->getDescribedFunctionTemplate())
             Diag(DiagD->getLocation(), diag::warn_unused_template)
                 << /*function=*/0 << DiagD << DiagRange;

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https://github.com/llvm/llvm-project/pull/81167