[media] vb2: Don't WARN when v4l2_buffer.bytesused is 0 for multiplanar buffers

[media] vb2: Don't WARN when v4l2_buffer.bytesused is 0 for multiplanar buffers

Commit f61bf13b6a07 ("[media] vb2: add allow_zero_bytesused flag to the
vb2_queue struct") added a WARN_ONCE to catch usage of a deprecated API
using a zero value for v4l2_buffer.bytesused.

However, the condition is checked incorrectly, as the v4L2_buffer
bytesused field is supposed to be ignored for multiplanar buffers. This
results in spurious warnings when using the multiplanar API.

Fix it by checking v4l2_buffer.bytesused for uniplanar buffers and
v4l2_plane.bytesused for multiplanar buffers.

Fixes: f61bf13b6a07 ("[media] vb2: add allow_zero_bytesused flag to the vb2_queue struct")
Signed-off-by: Laurent Pinchart <[email protected]>
Cc: [email protected] # for v4.0
Signed-off-by: Mauro Carvalho Chehab <[email protected]>