COMPMID-1052 - Rework validate method in CLGEMM

Change-Id: Iece5bd6478b5fac5164abff30c1e63e8a77291a9
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/130374
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/CL/kernels/CLGEMMMatrixAdditionKernel.h b/arm_compute/core/CL/kernels/CLGEMMMatrixAdditionKernel.h
index dc84a40..3755d94 100644
--- a/arm_compute/core/CL/kernels/CLGEMMMatrixAdditionKernel.h
+++ b/arm_compute/core/CL/kernels/CLGEMMMatrixAdditionKernel.h
@@ -65,7 +65,7 @@
      *
      * @return a status
      */
-    static Status validate(const ITensorInfo *input, const ITensorInfo *output, const float beta);
+    static Status validate(const ITensorInfo *input, const ITensorInfo *output, float beta);
 
     // Inherited methods overridden:
     void run(const Window &window, cl::CommandQueue &queue) override;