radv: Generate storage image descriptors unconditionally

radv: Generate storage image descriptors unconditionally

We can also use storage images internally for resolves, which don't
require TRANSFER_DST usage on the image, so currently we may not create
the needed descriptors.

Just create these descriptors unconditionally.

Fixes: 0e1886efb9e ("radv: Fix descriptors for cube images with VK_IMAGE_USAGE_STORAGE_BIT")
Reported-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Alex Smith <asmith@feralinteractive.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>