scsi: snic: fix spelling mistake: "Cann't" -> "Cannot"

Trivial fix to spelling mistake in SNIC_ERR error message text, one
cannot have "Cann't".

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/snic/snic_debugfs.c

@@ -548,7 +548,7 @@ snic_trc_debugfs_init(void)
 				 &snic_trc_fops);
 
 	if (!de) {
-		SNIC_ERR("Cann't create trace file.\n");
+		SNIC_ERR("Cannot create trace file.\n");
 
 		return ret;
 	}