Added LQI access method. Patch by Moritz Struebe.
Added LQI access method. Patch by Moritz Struebe.

mspsim/mspsim,nfi/mspsim,joakimeriksson/mspsim,cmorty/mspsim,ransford/mspsim,nfi/mspsim,cmorty/mspsim,fvdnabee/mspsim,contiki-os/mspsim,ransford/mspsim,mspsim/mspsim,joakimeriksson/mspsim,fvdnabee/mspsim,contiki-os/mspsim