Some boards need specifying LED pin in order to get it working.
For example, in board HW556 (Huawei HG556a) "led_pin" must be "2".
By default led_pin is "0", so dsl_274xb_rev_f is changed to "-1".
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34321 3c298f89-4303-0410-b956-a3cf2f4a3e73
