Draft: patches/openwrt: tweak leds setup patch for Omnia

First change is that the LEDs should have been configured in leds configuration file not in network one. This moves it there.

Second and most important change is the change from list of WiFi devices to just plain wlan list for three wlan devices. This is in no way ideal as it relies on initialization of PCI devices in order. This means that leds won't no longer reflect exactly the position in PCI slot but rather order of initialization. The issue we are trying to solve here is that original code just wasn't working as WiFi devices are not initialized at time of this script execution. The result was that WiFi leds just were not configured at all, at least till the system update that caused re-execution of this script later in system execution.

And the last change is the move of this patch from branding to to-upstream. We can't push it right now but we should be able in the future once upstream updates kernel to version with our RGB leds support.