remove toGPU in generic MemTransfer::prepareInput, called from higer level
remove toGPU in generic MemTransfer::prepareInput, called from higer level

hunter-packages/ogles_gpgpu,hunter-packages/ogles_gpgpu,hunter-packages/ogles_gpgpu,headupinclouds/ogles_gpgpu,headupinclouds/ogles_gpgpu,headupinclouds/ogles_gpgpu,hunter-packages/ogles_gpgpu,headupinclouds/ogles_gpgpu