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/runtime/gpu/cl/operators/ClPRelu.h b/src/runtime/gpu/cl/operators/ClPRelu.h
index 70202ae..3a02030 100644
--- a/src/runtime/gpu/cl/operators/ClPRelu.h
+++ b/src/runtime/gpu/cl/operators/ClPRelu.h
@@ -38,8 +38,6 @@
 class ClPRelu : public IClOperator
 {
 public:
-    /** Default constructor */
-    ClPRelu() = default;
     /** Set the input and output tensor.
      *
      * @note If the output tensor is a nullptr or is equal to the input, the activation function will be performed in-place
@@ -50,11 +48,9 @@
      * @param[out] output          Destination tensor. Data type supported: same as @p input
      */
     void configure(const CLCompileContext &compile_context, ITensorInfo *input, ITensorInfo *alpha, ITensorInfo *output);
-    /** Static function to check if given info will lead to a valid configuration of @ref arm_compute::opencl::kernels::ClArithmeticKernel for PRELU
+    /** Static function to check if given info will lead to a valid configuration
      *
-     * @param[in] input  Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
-     * @param[in] alpha  PRelu layer parameters. Data types supported: same of @p input.
-     * @param[in] output Destination tensor info. Data type supported: same as @p input
+     * Similar to ClPRelu::configure()
      *
      * @return a status
      */