f16 benchmarks - add cpuinfo check for FP16

PiperOrigin-RevId: 313902799
diff --git a/bench/f16-gemm.cc b/bench/f16-gemm.cc
index 6dada87..b12d949 100644
--- a/bench/f16-gemm.cc
+++ b/bench/f16-gemm.cc
@@ -35,6 +35,9 @@
     state.SkipWithError("cpuinfo initialization failed");
     return;
   }
+  if (!benchmark::utils::CheckNEONFP16ARITH(state)) {
+    return;
+  }
 
   const size_t mc = state.range(0);
   const size_t nc = state.range(1);