The mdio bus number of mv88e6xxx was changed to '0' from '1' and the
"mv88e6xxx-1:<addr>:<speed>" triggers are unavailable now.
Update triggers for "SPEED" LEDs to make working that LEDs again.
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16409
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>