panfrost: Ensure we have ro before using it
Even through the resouce requested has a BIND_SCANOUT or related tag, this does not mean that we have a render-only driver.
This can trivially happen as one requests such resource from GBM, while using the panfrost fd (and hence panfrost_dri.so)
Forward port of !3000 (closed)
Signed-off-by: Emil Velikov emil.velikov@collabora.com Signed-off-by: Robert Foss robert.foss@collabora.com Signed-off-by: Alyssa Rosenzweig alyssa.rosenzweig@collabora.com Closes: #2664 (closed)