scsi: mptfc: Remove unneeded cast from memory allocation

Remove casting the values returned by memory allocation function.

Coccinelle emits WARNING:

./drivers/message/fusion/mptfc.c:766:17-30: WARNING: casting value returned by memory allocation function to (FCPortPage0_t *) is useless.
./drivers/message/fusion/mptfc.c:907:17-30: WARNING: casting value returned by memory allocation function to (FCPortPage1_t *) is useless.

[mkp: memset()]

Link: https://lore.kernel.org/r/1596014354-59935-1-git-send-email-liheng40@huawei.comSigned-off-by: Li Heng <liheng40@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/message/fusion/mptfc.c

@@ -763,7 +763,7 @@ mptfc_GetFcPortPage0(MPT_ADAPTER *ioc, int portnum)
 
 	data_sz = hdr.PageLength * 4;
 	rc = -ENOMEM;
-	ppage0_alloc = (FCPortPage0_t *) pci_alloc_consistent(ioc->pcidev, data_sz, &page0_dma);
+	ppage0_alloc = pci_alloc_consistent(ioc->pcidev, data_sz, &page0_dma);
 	if (ppage0_alloc) {
 
  try_again:
@@ -904,7 +904,7 @@ mptfc_GetFcPortPage1(MPT_ADAPTER *ioc, int portnum)
 		if (data_sz < sizeof(FCPortPage1_t))
 			data_sz = sizeof(FCPortPage1_t);
 
-		page1_alloc = (FCPortPage1_t *) pci_alloc_consistent(ioc->pcidev,
+		page1_alloc = pci_alloc_consistent(ioc->pcidev,
 						data_sz,
 						&page1_dma);
 		if (!page1_alloc)
@@ -922,8 +922,6 @@ mptfc_GetFcPortPage1(MPT_ADAPTER *ioc, int portnum)
 		}
 	}
 
-	memset(page1_alloc,0,data_sz);
-
 	cfg.physAddr = page1_dma;
 	cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;