fighter: default clock speed to 1.2GHz

The stock clock speed for fireball/fighter is 1.2GHz. This defaults
the device to the correct speed while still allowing slection of up
to 1.5GHz under the performance menu.

Change-Id: I4c49cdeec6079a4f8453cd9cf5967a7920056d5a
Merge "fighter: default clock speed to 1.2GHz" into cm-10.1