TTY:vt: convert remain take_over_console's users to do_take_over_console

Impact:
1:convert all remain take_over_console to do_take_over_console
2:update take_over_console to do_take_over_console in comment

Commit dc9641895abb ("vt: delete unneeded functions
register_con_driver|take_over_console") delete take_over_console,
but forget to convert remain take_over_console's users to new API
do_take_over_console, this patch fix it.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c
index 0b67866..296e945 100644
--- a/drivers/video/console/mdacon.c
+++ b/drivers/video/console/mdacon.c
@@ -585,10 +585,14 @@
 
 int __init mda_console_init(void)
 {
+	int err;
+
 	if (mda_first_vc > mda_last_vc)
 		return 1;
-
-	return take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);
+	console_lock();
+	err = do_take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);
+	console_unlock();
+	return err;
 }
 
 static void __exit mda_console_exit(void)