scsi: qla2xxx: Remove duplicate declarations

scsi: qla2xxx: Remove duplicate declarations

qla2x00_post_uevent_work(), qla2x00_free_fcport() and ql2xexlogins are
declared multiple times. Remove the duplicates.

Link: https://lore.kernel.org/r/1621843402-34828-1-git-send-email-zhangshaokun@hisilicon.com
Cc: Nilesh Javali <njavali@marvell.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>