Implemented getters for the mcu frequencies
Implemented getters for the mcu frequencies

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