[clang] [llvm] [AArch64] Update target feature requirements of SVE bfloat instructions (PR #75596)

[Sander de Smalen via cfe-commits]

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@@ -2066,7 +2066,7 @@ let TargetGuard = "sve2p1|sme2" in {
   def SVPFALSE_COUNT_ALIAS : SInst<"svpfalse_c", "}v", "", MergeNone, "", [IsOverloadNone, IsStreamingCompatible]>;
 }
 
-let TargetGuard = "sve2p1,b16b16" in {
+let TargetGuard = "(sve2|sme2),b16b16" in {
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sdesmalen-arm wrote:

nit: Github doesn't allow me to select the right line, but the comment on line 2083 is no longer correct.

https://github.com/llvm/llvm-project/pull/75596