Add option to set LED brightness via uci:
config led 'led_blue'
option name 'blue'
option sysfs 'blue:status'
option brightness '1'
Signed-off-by: Paweł Owoc <frut3k7@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17190
Signed-off-by: John Crispin <john@phrozen.org>