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/ClWidthConcatenateKernel.h b/src/core/gpu/cl/kernels/ClWidthConcatenateKernel.h
index 6bc8e57..300c4be 100644
--- a/src/core/gpu/cl/kernels/ClWidthConcatenateKernel.h
+++ b/src/core/gpu/cl/kernels/ClWidthConcatenateKernel.h
@@ -21,8 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef ARM_COMPUTE_CL_WIDTH_CONCATENATE_LAYER_KERNEL_H
-#define ARM_COMPUTE_CL_WIDTH_CONCATENATE_LAYER_KERNEL_H
+#ifndef ARM_COMPUTE_CL_WIDTH_CONCATENATE_KERNEL_H
+#define ARM_COMPUTE_CL_WIDTH_CONCATENATE_KERNEL_H
 
 #include "src/core/common/Macros.h"
 #include "src/core/gpu/cl/ClCompileContext.h"
@@ -40,7 +40,6 @@
 class ClWidthConcatenateKernel : public IClKernel
 {
 public:
-    /** Default constructor */
     ClWidthConcatenateKernel();
     ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(ClWidthConcatenateKernel);
     /** Initialise the kernel's source and destination
@@ -52,11 +51,9 @@
      *
      */
     void configure(const CLCompileContext &compile_context, ITensorInfo *src, unsigned int width_offset, ITensorInfo *dst);
-    /**  Static function to check if given info will lead to a valid configuration of @ref ClWidthConcatenateKernel
+    /** Static function to check if given info will lead to a valid configuration
      *
-     * @param[in] src          Source tensor info. Data types supported: All.
-     * @param[in] width_offset The offset on the X axis.
-     * @param[in] dst          Destination tensor info. Data types supported: same as @p src.
+     * Similar to @ref ClWidthConcatenateKernel::configure()
      *
      * @return a status
      */
@@ -68,4 +65,4 @@
 } // namespace kernels
 } // namespace opencl
 } // namespace arm_compute
-#endif /* ARM_COMPUTE_CL_WIDTH_CONCATENATE_LAYER_KERNEL_H */
+#endif /* ARM_COMPUTE_CL_WIDTH_CONCATENATE_KERNEL_H */