[LEDE-DEV] [PATCH] leds-apu2: add newer board names

[Sebastian Fleer]

After building coreboot myself, I discovered that the board names 
changed again - they now seem to be the same as before.
https://github.com/pcengines/coreboot/commit/3578e9fb6dac753ec9365c88a8556ca1b90a8deb

I guess the "PC Engines apuX" strings can be considered to be a bug on 
the PCEngines side then. Just ignore my patch.
Once there is a binary release of a fixed version (probably 4.6.8), I 
can put a note on the apu2 wiki page.

Sebastian