treewide: Fix typos in printk

Correct spelling typo in various drivers.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c
index 463597f..8c351f1 100644
--- a/drivers/net/ethernet/ti/cpts.c
+++ b/drivers/net/ethernet/ti/cpts.c
@@ -94,7 +94,7 @@
 		case CPTS_EV_HW:
 			break;
 		default:
-			pr_err("cpts: unkown event type\n");
+			pr_err("cpts: unknown event type\n");
 			break;
 		}
 		if (type == match)