tty: Fix typo in tty drivers

Correct spelling typo in debug messages within tty drivers.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index bd97db2..58913ee 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -815,7 +815,7 @@
 		lcr = WLS(5);
 		break;
 	default:
-		printk(KERN_ERR "%s: word lengh not supported\n",
+		printk(KERN_ERR "%s: word length not supported\n",
 			__func__);
 	}