Decouple NEInstanceNormalizationLayerKernel

Resolves COMPMID-4620
Signed-off-by: Dana Zlotnik <dana.zlotnik@arm.com>
Change-Id: I22c285339840493c9cfd4c1abfbc3768ad4db824
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/6871
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giorgio Arena <giorgio.arena@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/filelist.json b/filelist.json
index a093f60..58c2a9a 100644
--- a/filelist.json
+++ b/filelist.json
@@ -1530,7 +1530,12 @@
           "common": [
             "src/core/NEON/kernels/NEInstanceNormalizationLayerKernel.cpp",
             "src/runtime/NEON/functions/NEInstanceNormalizationLayer.cpp"
-          ]
+          ], 
+          "neon":{
+            "common":["src/cpu/kernels/instancenorm/generic/neon/impl.cpp"],
+            "fp16":["src/cpu/kernels/instancenorm/generic/neon/fp16.cpp"],
+            "fp32":["src/cpu/kernels/instancenorm/generic/neon/fp32.cpp"]
+          }
         }
       },
       "L2Normalize": {