As Zink has gained support for renderonly devices, wire it up to KMSRO
to allow such kind of usage.
Among all renderonly drivers, Zink is a little special that it does not
bind to a specific driver name, so it's made a fallback option which is
checked after all driver name checks.
Signed-off-by: Frank Binns <frank.binns@imgtec.com>
[Icenowy: split patch, forward port, de-hardcode "powervr"]
Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Reviewed-By: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38810>