ac/surface: Fix depth import on GFX6-GFX8.

Lets just do depth interop imports by convention between radv and
radeonsi for now. The only thing using this should be Vulkan interop
anyway.

CC: mesa-stable
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6617>
1 file changed