treewide: Fix typos in various drivers

Fix typos in printk within various drivers.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/media/dvb-frontends/drxk_hard.c b/drivers/media/dvb-frontends/drxk_hard.c
index 8b4c6d5..df9abe8 100644
--- a/drivers/media/dvb-frontends/drxk_hard.c
+++ b/drivers/media/dvb-frontends/drxk_hard.c
@@ -948,7 +948,7 @@
 		state->m_oscClockFreq = 20250;
 		break;
 	default:
-		printk(KERN_ERR "drxk: Clock Frequency is unkonwn\n");
+		printk(KERN_ERR "drxk: Clock Frequency is unknown\n");
 		return -EINVAL;
 	}
 	/*