[RK3588] enable Mali CSF based GPU support
Add a kernel configuration fragment that enables support for Mali CSF only for the rk3588.
This was previously done in the common seco_linux_defconfig but it broke the video for E09 (rk3568), which has a GPU not compatible with the CSF: https://git.seco.com/edgehog/bsp/rockchip/linux-seco-rk/-/merge_requests/48
Edited by Alessandro Pecugi