media: vsp1_dl: add a description for cmdpool field

Gets rid of this build warning:
	drivers/media/platform/vsp1/vsp1_dl.c:229: warning: Function parameter or member 'cmdpool' not described in 'vsp1_dl_manager'

Fixes: f3b98e3c4d2e ("media: vsp1: Provide support for extended command pools")
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vsp1/vsp1_dl.c

@@ -211,7 +211,7 @@ struct vsp1_dl_list {
  * @queued: list queued to the hardware (written to the DL registers)
  * @pending: list waiting to be queued to the hardware
  * @pool: body pool for the display list bodies
- * @autofld_cmds: command pool to support auto-fld interlaced mode
+ * @cmdpool: commands pool for extended display list
  */
 struct vsp1_dl_manager {
 	unsigned int index;