etnaviv: retarget transfer to render resource when necessary

etnaviv: retarget transfer to render resource when necessary

If we have a separate render resource, it may contain more up-to-date
data than what is available in the base resource, so we need to retarget
the transfer to this resource. As the most likely reason for the
existence of the render resource is a multi-tiled render layout we need
to allow this transfer to go through the resolve/blit copy path, as we
can't de-/tile those layouts in software.

Fixes: b96277653033 (etnaviv: rework compatible render base)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Jonathan Marek <jonathan@marek.ca>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5051>