turnip: Disable UBWC on images used as storage images.

turnip: Disable UBWC on images used as storage images.

The closed GL driver doesn't use UBWC on any storage images.  It does tile
mostly (skipping tiling on writeonly images, it seems), but for freedreno
we've been enabling tiling in all cases and it's fine.  We do need to
disable UBWC, as tests fail otherwise and just plugging in the equivalent
UBWC regs like we were setting up a texture isn't enough.

Fixes dEQP-VK.image.atomic_operations.*

Reviewed-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3433>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3433>