vt: delete unneeded function bind_con_driver

Now there is no place use bind_con_driver,
and do_bind_con_driver can achieve bind_con_driver's
function easily, so just delete it to reduce code size and
duplication.
Signed-off-by: NWang YanQing <udknight@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/vt/vt.c

@@ -3088,17 +3088,6 @@ static int do_bind_con_driver(const struct consw *csw, int first, int last,
 };
 
 
-static int bind_con_driver(const struct consw *csw, int first, int last,
-			   int deflt)
-{
-	int ret;
-
-	console_lock();
-	ret = do_bind_con_driver(csw, first, last, deflt);
-	console_unlock();
-	return ret;
-}
-
 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
 static int con_is_graphics(const struct consw *csw, int first, int last)
 {