[clang] [CLANG][AArch64] Add the modal 8 bit floating-point scalar type (PR #97277)

[Paul Walker via cfe-commits]

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@@ -1139,6 +1139,7 @@ class ASTContext : public RefCountedBase<ASTContext> {
   CanQualType SatShortFractTy, SatFractTy, SatLongFractTy;
   CanQualType SatUnsignedShortFractTy, SatUnsignedFractTy,
       SatUnsignedLongFractTy;
+  CanQualType MFloat8Ty;
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paulwalker-arm wrote:

For this and all related "in llvm code" naming, do you mind using the `ArmMFloat8` prefix instead of `MFloat8`?  I ask because BFloat16 has an architecture independent meaning whereas this new type is specific to Arm and its related builtins.

https://github.com/llvm/llvm-project/pull/97277