[llvm] [LLVM][AARCH64]Replace +sme2p1+smef16f16 by +smef16f16 (PR #88860)

[Momchil Velikov via llvm-commits]

================
@@ -516,7 +516,7 @@ def FeatureSMEI16I64 : SubtargetFeature<"sme-i16i64", "HasSMEI16I64", "true",
   "Enable Scalable Matrix Extension (SME) I16I64 instructions (FEAT_SME_I16I64)", [FeatureSME]>;
 
 def FeatureSMEF16F16 : SubtargetFeature<"sme-f16f16", "HasSMEF16F16", "true",
-  "Enable SME2.1 non-widening Float16 instructions (FEAT_SME_F16F16)", []>;
+  "Enable non-widening Float16 instructions (FEAT_SME_F16F16)", [FeatureSME]>;
----------------
momchil-velikov wrote:

This dependency here ought to be `FeatureSME2`

https://github.com/llvm/llvm-project/pull/88860