Added access method to retrieve all chips of specified type
Added access method to retrieve all chips of specified type

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