scsi: lpfc: Fix typo in comment for ULP

UPL -> ULP for "Upper Layer Protocol"

Link: https://lore.kernel.org/r/20200728145606.1601726-1-ferruh.yigit@intel.com


Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>