The gmac definition has an offset of 1 compared to the label MAC.
Fixes: a55ab9e134 ("mediatek: filogic: prevent faulty mac address assignment")
Signed-off-by: Maximilian Baumgartner <aufhaxer@googlemail.com>
Link: https://github.com/openwrt/openwrt/pull/21560
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 687a2535d5)