Make ClPixelWiseMultiplicationKernel stateless

Partially resolves: COMPMID-4183

Signed-off-by: Sheri Zhang <sheri.zhang@arm.com>
Change-Id: Ibc08d2d84d023ef8b23ed44d534aa1ca24515e4d
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5274
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/docs/00_introduction.dox b/docs/00_introduction.dox
index af840ec..67702c2 100644
--- a/docs/00_introduction.dox
+++ b/docs/00_introduction.dox
@@ -874,7 +874,7 @@
     - @ref NEFFT2D
     - @ref NEFFTConvolutionLayer
  - New OpenCL kernels / functions:
-    - @ref CLComplexPixelWiseMultiplicationKernel / @ref CLComplexPixelWiseMultiplication
+    - CLComplexPixelWiseMultiplicationKernel / @ref CLComplexPixelWiseMultiplication
     - CLCropKernel / @ref CLCropResize
     - @ref CLDeconvolutionReshapeOutputKernel
     - @ref CLFFTDigitReverseKernel
@@ -1062,7 +1062,7 @@
  - Added QASYMM8 support to the following kernels:
     - CLScaleKernel
     - NEDepthwiseConvolutionLayer3x3Kernel
-    - @ref CLPixelWiseMultiplicationKernel
+    - CLPixelWiseMultiplicationKernel
  - Added FP16 support to the following kernels:
     - @ref CLDepthwiseConvolutionLayer3x3NHWCKernel
     - NEDepthwiseConvolutionLayer3x3Kernel