ata: pata_artop: Fix a function name and parameter description

Fixes the following W=1 kernel build warning(s):

 drivers/ata/pata_artop.c:278: warning: expecting prototype for artop_6210_qc_defer(). Prototype was for artop6210_qc_defer() instead
 drivers/ata/pata_artop.c:359: warning: Function parameter or member 'id' not described in 'artop_init_one'
 drivers/ata/pata_artop.c:359: warning: Excess function parameter 'ent' description in 'artop_init_one'

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Andre Hedrick <andre@linux-ide.org>
Cc: Thibaut VARENE <varenet@parisc-linux.org>
Cc: Alessandro Zummo <alessandro.zummo@towertech.it>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>