Winograd changes to enable fp16 in armv8a multi_isa builds

* Changes in filelist.json: moved fp16 code from common to fp16

* Replaced the guard __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
  with ENABLE_FP16_KERNELS.

* Resolves COMPMID-6755

Change-Id: I4da1c53d3f9e4734e5e67125265ab4e3fc0dcbe4
Signed-off-by: Pablo Marquez Tello <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/10865
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Jakub Sujak <jakub.sujak@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/filelist.json b/filelist.json
index 3fd48e6..617b016 100644
--- a/filelist.json
+++ b/filelist.json
@@ -1125,27 +1125,20 @@
               "src/core/NEON/kernels/convolution/common/qasymm8.cpp",
               "src/core/NEON/kernels/convolution/common/qsymm8.cpp",
               "src/core/NEON/kernels/convolution/common/utils.cpp",
-              "src/core/NEON/kernels/convolution/winograd/input_transforms_fp16.cpp",
               "src/core/NEON/kernels/convolution/winograd/input_transforms_fp32.cpp",
-              "src/core/NEON/kernels/convolution/winograd/output_transforms_fp16.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms_fp32.cpp",
-              "src/core/NEON/kernels/convolution/winograd/weight_transforms_fp16.cpp",
               "src/core/NEON/kernels/convolution/winograd/weight_transforms_fp32.cpp",
-              "src/core/NEON/kernels/convolution/winograd/winograd_fp16.cpp",
               "src/core/NEON/kernels/convolution/winograd/winograd_fp32.cpp",
-              "src/core/NEON/kernels/convolution/winograd/input_transforms/a64_fp16_6x6.cpp",
               "src/core/NEON/kernels/convolution/winograd/input_transforms/a64_fp32_6x6.cpp",
               "src/core/NEON/kernels/convolution/winograd/input_transforms/arm_fp32_1x8.cpp",
               "src/core/NEON/kernels/convolution/winograd/input_transforms/arm_fp32_4x4.cpp",
               "src/core/NEON/kernels/convolution/winograd/input_transforms/arm_fp32_6x6.cpp",
-              "src/core/NEON/kernels/convolution/winograd/output_transforms/a64_fp16_4x4_3x3.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms/arm_fp32_1x2_1x7.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms/arm_fp32_1x4_1x5.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms/arm_fp32_1x6_1x3.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms/arm_fp32_2x2_3x3.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms/arm_fp32_2x2_5x5.cpp",
               "src/core/NEON/kernels/convolution/winograd/output_transforms/arm_fp32_4x4_3x3.cpp",
-              "src/core/NEON/kernels/convolution/winograd/weight_transforms/a64_fp16_4x4_3x3.cpp",
               "src/core/NEON/kernels/convolution/winograd/weight_transforms/arm_fp32_2x2_3x3.cpp",
               "src/core/NEON/kernels/convolution/winograd/weight_transforms/arm_fp32_2x2_5x5.cpp",
               "src/core/NEON/kernels/convolution/winograd/weight_transforms/arm_fp32_4x4_3x3.cpp",
@@ -1162,6 +1155,13 @@
             ],
             "fp16": [
               "src/cpu/kernels/directconv2d/nchw/fp16.cpp",
+              "src/core/NEON/kernels/convolution/winograd/winograd_fp16.cpp",
+              "src/core/NEON/kernels/convolution/winograd/input_transforms_fp16.cpp",
+              "src/core/NEON/kernels/convolution/winograd/output_transforms_fp16.cpp",
+              "src/core/NEON/kernels/convolution/winograd/weight_transforms_fp16.cpp",
+              "src/core/NEON/kernels/convolution/winograd/input_transforms/a64_fp16_6x6.cpp",
+              "src/core/NEON/kernels/convolution/winograd/output_transforms/a64_fp16_4x4_3x3.cpp",
+              "src/core/NEON/kernels/convolution/winograd/weight_transforms/a64_fp16_4x4_3x3.cpp",
               "src/cpu/kernels/directconv2d/nhwc/neon/fp16.cpp"
             ]
           },