va: use resources instead of sampler views in va frontend
A new method called get_resources()
is added to pipe_video_buffer. At the moment, only vl, d3d12 and nouveau implement get_sampler_view_planes()
, hence requiring changes to only these three drivers. The main objective is to use get_resources()
in place of get_sampler_view_planes()
when there is no necessity for sampler views.