libata: fix kernel-doc warnings

Fix libata kernel-doc warnings:

Warning(linux-next-20090120//drivers/ata/libata-core.c:4720): Excess function parameter 'dev' description in 'ata_qc_new'
Warning(linux-next-20090120//drivers/ata/libata-scsi.c:428): No description found for parameter 'ap'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 3c4c5ae..b9747fa 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -415,6 +415,7 @@
 
 /**
  *	ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
+ *	@ap: target port
  *	@sdev: SCSI device to get identify data for
  *	@arg: User buffer area for identify data
  *