vb2: Fix queue_setup() callback description

Correct meaning of the last sensence by swapping it with previous.
Fix two small typos.

Signed-off-by: Anton Leontiev <scileont@gmail.com>

Author: bunder

include/media/videobuf2-core.h

@@ -305,16 +305,16 @@ struct vb2_buffer {
  *			buffer in \*num_planes, the size of each plane should be
  *			set in the sizes\[\] array and optional per-plane
  *			allocator specific device in the alloc_devs\[\] array.
- *			When called from VIDIOC_REQBUFS,() \*num_planes == 0,
+ *			When called from VIDIOC_REQBUFS(), \*num_planes == 0,
  *			the driver has to use the currently configured format to
  *			determine the plane sizes and \*num_buffers is the total
  *			number of buffers that are being allocated. When called
- *			from VIDIOC_CREATE_BUFS,() \*num_planes != 0 and it
+ *			from VIDIOC_CREATE_BUFS(), \*num_planes != 0 and it
  *			describes the requested number of planes and sizes\[\]
- *			contains the requested plane sizes. If either
- *			\*num_planes or the requested sizes are invalid callback
- *			must return %-EINVAL. In this case \*num_buffers are
- *			being allocated additionally to q->num_buffers.
+ *			contains the requested plane sizes. In this case
+ *			\*num_buffers are being allocated additionally to
+ *			q->num_buffers. If either \*num_planes or the requested
+ *			sizes are invalid callback must return %-EINVAL.
  * @wait_prepare:	release any locks taken while calling vb2 functions;
  *			it is called before an ioctl needs to wait for a new
  *			buffer to arrive; required to avoid a deadlock in