radv: Handle slightly different image dimensions.
The minigbm comment really says it all. We should
fix minigbm as well, but for now this is the more
robust solution.
Note that this only changes width and height for
the surface creation, not for the image and hence
also not for the sampler, where it would wreak
havoc due to the normalized coords.
Reviewed-by:
Samuel Pitoiset <samuel.pitoiset@gmail.com>