vrend: handle no feat_texture_view in sampler views
Per-plane sampler views don't require texture views, so move where that check is performed when creating sampler views. Also, it's not necessarily the case that a planar resource's egl image can be reused for the first plane's sampler view, so just always create and use a dedicated per-plane egl image.
Signed-off-by: David Stevens stevensd@chromium.org