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/cpu/operators/CpuScale.h b/src/runtime/cpu/operators/CpuScale.h
index 90248a8..b83e04b 100644
--- a/src/runtime/cpu/operators/CpuScale.h
+++ b/src/runtime/cpu/operators/CpuScale.h
@@ -40,8 +40,6 @@
 class CpuScale : public ICpuOperator
 {
 public:
-    /** Default Constructor */
-    CpuScale();
     /** Initialize the function's source, destination, interpolation type and border_mode.
      *
      * @param[in, out] src  Source tensor info. Data type supported: QASYMM8/QASYMM8_SIGNED/U8/S16/F16/F32. (Written to only for @p border_mode != UNDEFINED)
@@ -49,11 +47,9 @@
      * @param[in]      info @ref ScaleKernelInfo to be used for configuration
      */
     void configure(ITensorInfo *src, ITensorInfo *dst, const ScaleKernelInfo &info);
-    /** Static function to check if given info will lead to a valid configuration of @ref NEScale
+    /** Static function to check if given info will lead to a valid configuration
      *
-     * @param[in] src  Source tensor info. Data type supported: QASYMM8/QASYMM8_SIGNED/U8/S16/F16/F32. (Written to only for @p border_mode != UNDEFINED)
-     * @param[in] dst  Destination tensor info. Data type supported: Same as @p src. All but the lowest two dimensions must be the same size as in the input tensor, i.e. scaling is only performed within the XY-plane.
-     * @param[in] info @ref ScaleKernelInfo to be used for validation
+     * Similar to @ref CpuScale::configure()
      *
      * @return a status
      */
@@ -64,10 +60,10 @@
     void run(ITensorPack &tensors) override;
 
 private:
-    ScaleKernelInfo _scale_info;
-    DataLayout      _data_layout;
-    bool            _is_prepared;
+    ScaleKernelInfo _scale_info{ InterpolationPolicy::NEAREST_NEIGHBOR, BorderMode::UNDEFINED };
+    DataLayout      _data_layout{ DataLayout::UNKNOWN };
+    bool            _is_prepared{ false };
 };
 } // namespace cpu
 } // namespace arm_compute
-#endif /*ARM_COMPUTE_CPU_SCALE_H */
+#endif /* ARM_COMPUTE_CPU_SCALE_H */