scsi: snic: Use vzalloc

Replaced vmalloc + memset with vzalloc
Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com>
Acked-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/snic/snic_trc.c

@@ -126,7 +126,7 @@ snic_trc_init(void)
 	int tbuf_sz = 0, ret;
 
 	tbuf_sz = (snic_trace_max_pages * PAGE_SIZE);
-	tbuf = vmalloc(tbuf_sz);
+	tbuf = vzalloc(tbuf_sz);
 	if (!tbuf) {
 		SNIC_ERR("Failed to Allocate Trace Buffer Size. %d\n", tbuf_sz);
 		SNIC_ERR("Trace Facility not enabled.\n");
@@ -135,7 +135,6 @@ snic_trc_init(void)
 		return ret;
 	}
 
-	memset(tbuf, 0, tbuf_sz);
 	trc->buf = (struct snic_trc_data *) tbuf;
 	spin_lock_init(&trc->lock);