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

[via llvm-commits]

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@@ -2086,7 +2086,7 @@ let TargetGuard = "sve2p1|sme2" in {
   def SVCNTP_COUNT : SInst<"svcntp_{d}", "n}i", "QcQsQiQl", MergeNone, "aarch64_sve_cntp_{d}", [IsOverloadNone, IsStreamingCompatible], [ImmCheck<1, ImmCheck2_4_Mul2>]>;
 }
 
-let TargetGuard = "sve2p1,b16b16" in {
+let TargetGuard = "(sve2|sme2),b16b16" in {
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CarolineConcatto wrote:

If we are adding for sme2 then we need to add the streaming compatible flag and also update the tests.

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