vkd3d requires cached memory type.
MSM backed supports cached-coherent but not cached non-coherent since there is no way to flush and invalidate the memory.
KGSL supports both.
Note, CTS tests doesn't seem good at testing flushing and invalidating, the ones I found passed on KGSL with both functions being no-op.
Based on the old patch from Jonathan Marek.
Closes: #7636
Original MR: !6949
Regarding non-coherent cached memory on MSM, I think the last attempt to provide the functionality in kernel stalled long time ago: https://lore.kernel.org/lkml/20201001002709.21361-3-jonathan@marek.ca/
@robclark I guess no other alternative to it went through?