The Netgear GS3xx devices do not properly initialise the port LEDs during
startup unless the boot command in U-Boot is changed. Making the U-Boot
env partition writable allows this modification to be done from within
OpenWrt by calling "fw_setenv bootcmd rtk network on\; boota".
Signed-off-by: Andreas Böhler <dev@aboehler.at>
(cherry picked from commit d9e12c21fa98c90d0cc355e344d90469c5fd42c1)
daa8d7e32d