The RGB LED of the UniFi 6 LR v1 doesn't work when using the Openwrt-
built U-Boot. This is because the vendor loader resets the ledbar
controller while our U-Boot doesn't care.
Add reset-gpio so the ledbar driver in Linux will always reset the
ledbar controller.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 0b5cf952cf5b70d3af2424d05b15ce2730a3dc11)