gallium/dri: allow create image for formats that only support SV or RT binding

Unconditionally requesting both bindings can lead to premature
failure to create a valid image.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7028>
1 file changed