IVGCVSW-863 calculate_max_window..() family takes ValidRegion

Change-Id: I91e39713ffa580e9d2213988ad3517a8a41bf4e8
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/114013
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/src/core/GLES_COMPUTE/kernels/GCGEMMMatrixMultiplyKernel.cpp b/src/core/GLES_COMPUTE/kernels/GCGEMMMatrixMultiplyKernel.cpp
index 32fbbfe..a5f09e8 100644
--- a/src/core/GLES_COMPUTE/kernels/GCGEMMMatrixMultiplyKernel.cpp
+++ b/src/core/GLES_COMPUTE/kernels/GCGEMMMatrixMultiplyKernel.cpp
@@ -106,7 +106,7 @@
 
         update_window_and_padding(win, input0_access, input1_access, output_access);
 
-        output_access.set_valid_region(win, ValidRegion(Coordinates(0, 0), output->info()->tensor_shape()));
+        output_access.set_valid_region(win, ValidRegion(Coordinates(), output->info()->tensor_shape()));
     }
     else
     {