scsi: lpfc: Remove set but not used variables 'qp'

Fixes gcc '-Wunused-but-set-variable' warnings:

drivers/scsi/lpfc/lpfc_init.c: In function lpfc_setup_cq_lookup:
drivers/scsi/lpfc/lpfc_init.c:9359:30: warning: variable qp set but not used [-Wunused-but-set-variable]

It's not used since commit e70596a60f88 ("scsi: lpfc: Fix poor use of
hardware queues if fewer irq vectors")

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