tuna: Make PowerHAL more flexible

- update for Ondemand governor
kanged from http://review.cyanogenmod.com/#/c/20919/

- sync with latest from Cyanogenmod [22/02/2013]

Change-Id: Ic535aa1962f4a8e25cd4ce9871c98b760e56dd78
tuna: Enable Cortex-A9 bionic optimizations

- Set dlmalloc alignment to 16-byte
- ARM Cortex A9 uses 32 bytes cache line
- Disable bugmailer and cleanup whitespace

Change-Id: I4b43e46f78c0632b8675e89bd372383d9d021b1d