COMPMID-959: Add FP32 support to GLES GEMMConvolution

The following kernels were supposed to have FP32 support but this was not the
case because of bugs and missing shaders:

- GCCol2Im
- GCIm2Col
- GCWeightsReshape

Change-Id: Ie6ea464db0612757c71c3d40874e7bb0d60f170a
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/127572
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/src/core/GLES_COMPUTE/kernels/GCIm2ColKernel.cpp b/src/core/GLES_COMPUTE/kernels/GCIm2ColKernel.cpp
index eb79047..6c89616 100644
--- a/src/core/GLES_COMPUTE/kernels/GCIm2ColKernel.cpp
+++ b/src/core/GLES_COMPUTE/kernels/GCIm2ColKernel.cpp
@@ -113,7 +113,7 @@
         _convolved_dims = scaled_dimensions(input->info()->dimension(0), input->info()->dimension(1),
                                             kernel_dims.width, kernel_dims.height,
                                             conv_info, dilation);
-        _num_elems_processed_per_iteration = 2;
+        _num_elems_processed_per_iteration = (input->info()->data_type() == DataType::F32) ? 1 : 2;
 
         build_opts.emplace("#define KERNEL_WIDTH " + support::cpp11::to_string(kernel_dims.width));
         build_opts.emplace("#define KERNEL_HEIGHT " + support::cpp11::to_string(kernel_dims.height));