[clang] [CLANG][AArch64]Add Neon vectors for mfloat8_t (PR #99865)

[Paul Walker via cfe-commits]

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@@ -2580,6 +2580,8 @@ void NeonEmitter::runVectorTypes(raw_ostream &OS) {
   OS << "typedef __fp16 float16_t;\n";
 
   OS << "#if defined(__aarch64__) || defined(__arm64ec__)\n";
+  OS << "typedef __MFloat8x8_t mfloat8x8_t;\n";
+  OS << "typedef __MFloat8x16_t mfloat8x16_t;\n";
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paulwalker-arm wrote:

Based on an offline conversation it has been agreed to wait for the scalar type to land before trying to extend `emitNeonTypeDefs` and thus this PR can continue as is..

https://github.com/llvm/llvm-project/pull/99865