treewide: Fix typo in printk

This patch fix spelling typo in printk within vairous
part of the code.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/net/bonding/bond_sysfs_slave.c

@@ -36,7 +36,7 @@ static ssize_t state_show(struct slave *slave, char *buf)
 	case BOND_STATE_BACKUP:
 		return sprintf(buf, "backup\n");
 	default:
-		return sprintf(buf, "UNKONWN\n");
+		return sprintf(buf, "UNKNOWN\n");
 	}
 }
 static SLAVE_ATTR_RO(state);