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If num_planes is different than zero num_planes and sizes must be
checked to support the format.

Fix the following v4l2-compliance error:

Buffer ioctls (Input 0):
    fail: v4l2-test-buffers.cpp(717): q.create_bufs(node, 1, &fmt) != EINVAL
  test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL
Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>