scsi: lpfc: Remove unused variable 'pg_addr'

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/lpfc/lpfc_sli.c: In function ‘lpfc_wq_create’:
 drivers/scsi/lpfc/lpfc_sli.c:15810:16: warning: variable ‘pg_addr’ set but not used [-Wunused-but-set-variable]
 15810 | unsigned long pg_addr;
 | ^~~~~~~

Link: https://lore.kernel.org/r/20200721164148.2617584-21-lee.jones@linaro.org
Cc: James Smart <james.smart@broadcom.com>
Cc: Dick Kennedy <dick.kennedy@broadcom.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: linux-media@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_sli.c

@@ -15998,9 +15998,9 @@ lpfc_wq_create(struct lpfc_hba *phba, struct lpfc_queue *wq,
 					wq->queue_id, pci_barset, db_offset,
 					wq->dpp_id, dpp_barset, dpp_offset);
 
+#ifdef CONFIG_X86
 			/* Enable combined writes for DPP aperture */
 			pg_addr = (unsigned long)(wq->dpp_regaddr) & PAGE_MASK;
-#ifdef CONFIG_X86
 			rc = set_memory_wc(pg_addr, 1);
 			if (rc) {
 				lpfc_printf_log(phba, KERN_ERR, LOG_INIT,