This adds the initial frequency poking and configures up enough
for it to boot and spit out data over the console.
There's still a whole bunch of work to do in the reset path
and devices to support this thing, but hey, it's alive!
ath> go 0x80050100
## Starting application at 0x80050100 ...
CPU platform: Atheros AR9558 rev 0
CPU Frequency=720 MHz
CPU DDR Frequency=600 MHz
CPU AHB Frequency=200 MHz
platform frequency: 720 MHz
CPU reference clock: 0 MHz
CPU MDIO clock: 40 MHz
Done at: hackathon
Obtained from: Linux OpenWRT, Qualcomm Atheros
855c46100d