[clang] [PowerPC] Fix use of FPSCR builtins in smmintrin.h (PR #67299)

[Qiu Chaofan via cfe-commits]

================
@@ -219,9 +234,14 @@ extern __inline __m128
      */
     __asm__("" : : "wa"(__r));
     /* Restore enabled exceptions.  */
-    __fpscr_save.__fr = __builtin_mffsl();
+#ifdef _ARCH_PWR9
+    __fpscr_save.__fr = __builtin_ppc_mffsl();
+#else
+    __fpscr_save.__fr = __builtin_ppc_mffs();
+    __fpscr_save.__fpscr &= 0x70007f0ffL;
----------------
ecnelises wrote:

Implemented by 
https://github.com/llvm/llvm-project/pull/67299/commits/2c7688c2076cce1d9e33a6881b70e042041078a8

https://github.com/llvm/llvm-project/pull/67299
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