WIP: Add ASUS RT-N65U support

Move changes from https://github.com/Linaro1985/padavan-ng/pull/64

• ported drivers from rt2860v2
  • missing support for MII
    • sources are based on rtsoc/PCI BUS, but RT3352 @2.4GHz is based on MII BUS
• iINIC_mii binary blob
• binary is not compatible with kernel 3.4.x
  • modified skbuff to make some functions public, which this blob requires
  • ported some required conditional-compilation flags
    • compilation was successful, but kernel hanged up after trying to load this module
  • without sources is only guessing what is wrong

Summ-up:

• device is working without 2.4GHz support as well
  • missing sources
• If you are ok, that we will support only 5GHz wifi, I can write some comment into device template.
• If not, I will make my own fork and disable 2.4GHz anyway. I don't need this wifi support.

Please let me know, if I make this MR ready for review or close it.