Add SME2 implementation of softmax for FP32

Signed-off-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Change-Id: I8a63610cfb9ccff89dec6045d023439fc19b027a
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/11357
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
diff --git a/filelist.json b/filelist.json
index 06a0913..f6e8547 100644
--- a/filelist.json
+++ b/filelist.json
@@ -2237,7 +2237,8 @@
             "common": [ "src/cpu/kernels/softmax/generic/sve/impl.cpp" ]
           },
           "sve2":{
-            "common" :["src/cpu/kernels/softmax/generic/sve2/impl.cpp"]
+            "common" :["src/cpu/kernels/softmax/generic/sve2/impl.cpp"],
+            "fp32" :["src/cpu/kernels/softmax/generic/sme2/fp32.cpp"]
           }
         }
       },