Align kernel/operator header layout

- Redirect validate documentation to configure
- Align header names
- Align class layout

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Ia40f67383826a66e9f9a33745d66805551e31a3a
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5897
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/core/gpu/cl/kernels/ClWinogradInputTransformKernel.h b/src/core/gpu/cl/kernels/ClWinogradInputTransformKernel.h
index 76b4527..40fc2f3 100644
--- a/src/core/gpu/cl/kernels/ClWinogradInputTransformKernel.h
+++ b/src/core/gpu/cl/kernels/ClWinogradInputTransformKernel.h
@@ -39,7 +39,6 @@
 class ClWinogradInputTransformKernel : public IClKernel
 {
 public:
-    /** Default constructor */
     ClWinogradInputTransformKernel();
     ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(ClWinogradInputTransformKernel);
     /** Set the input and output of the kernel.
@@ -76,13 +75,13 @@
 private:
     using WinogradKey = std::pair<std::pair<int, int>, std::pair<int, int>>;
 
-    BorderSize   _border_size;
-    DataLayout   _data_layout;
-    int          _num_tiles_x;
-    int          _num_tiles_y;
-    unsigned int _step_z;
+    BorderSize   _border_size{ 0 };
+    DataLayout   _data_layout{ DataLayout::UNKNOWN };
+    int          _num_tiles_x{ 0 };
+    int          _num_tiles_y{ 0 };
+    unsigned int _step_z{ 1 };
 };
 } // namespace kernels
 } // namespace opencl
 } // namespace arm_compute
-#endif /*ARM_COMPUTE_CL_WINOGRAD_INPUT_TRANSFORM_KERNEL_H */
+#endif /* ARM_COMPUTE_CL_WINOGRAD_INPUT_TRANSFORM_KERNEL_H */