I'd like to phase out the ISL surface representation of CCS on gfx120 in order to enable CCS without a 512B-aligned main surface pitch. Remove the dependency on CCS ISL surfaces when fast-clearing to move drivers one step towards that goal. Reviewed-by: Rohan Garg <rohan.garg@intel.com> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28536>