Port to AVM FRITZ!Box 3490

[andyboeh]

@DocMAX

do i have to apply all changes from this?: https://github.com/andyboeh/openwrt/commit/41126ccba6bb7929fcc46e81f3b12d0cb55cd35e

Yes

@DocMAX

and what is avm_fritzbox3490_wasp? (wasp?)

I explained how it all works together in the 7490 porting thread just a few hours ago: Support Fritzbox 7490 - #63 by andyboeh