scsi: lpfc: Removed unused macros in lpfc_attr.c

Removed unused MRQ-related defines that are not referenced.

Link: https://lore.kernel.org/r/20201020202719.54726-5-james.smart@broadcom.com


Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>