* Set up the PLL to run at 140 MHz, the CPU to run at the PLL
* frequency, the HSB and PBB busses to run at 1/2 the PLL frequency
* and the PBA bus to run at 1/4 the PLL frequency.
* Set up the PLL to run at 140 MHz, the CPU to run at the PLL
* frequency, the HSB and PBB busses to run at 1/2 the PLL frequency
* and the PBA bus to run at 1/4 the PLL frequency.