[clang] [ARM64EC] Fix compilation of intrin.h in ARM64EC mode. (PR #87717)

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``````````bash
git-clang-format --diff eeaaf33fc296d52a28252ba0d6cfe187b7b3412f 4de12f20fe15262a63414c8fe3bcd23b777853b3 -- clang/lib/Headers/intrin.h clang/lib/Headers/intrin0.h clang/test/Headers/ms-intrin.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Headers/intrin.h b/clang/lib/Headers/intrin.h
index 40073b4a9f..e890dcd7fe 100644
--- a/clang/lib/Headers/intrin.h
+++ b/clang/lib/Headers/intrin.h
@@ -384,7 +384,7 @@ void __cdecl __prefetch(void *);
 /*----------------------------------------------------------------------------*\
 |* Privileged intrinsics
 \*----------------------------------------------------------------------------*/
-#if defined(__i386__) || (defined(__x86_64__)  && !defined(__arm64ec__))
+#if defined(__i386__) || (defined(__x86_64__) && !defined(__arm64ec__))
 static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
 __readmsr(unsigned long __register) {
   // Loads the contents of a 64-bit model specific register (MSR) specified in

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https://github.com/llvm/llvm-project/pull/87717