hammerhead: Always keep 3 buffers ready

 * Reduces overall jank system-wide

Change-Id: I37f6021237c81197063d3fd1fd7e5e07626490c9
hammerhead: Better mount options to improve performance

Change-Id: I18f7165c2ff8547b7968d946336d948fe30522b1
HACK: Disable secure discard
 * Secure discard is causing wipes to take insane amounts of time.
 * Enable this workaround until the problem is sorted.

Change-Id: If9bbb27fd5476a160e9d7e8b29ab20a851410ff7

Conflicts:
	BoardConfig.mk
hammerhead: Update cpufreq settings

 * QC is switching to interactive. We will too.

Change-Id: I1ea4bdc75108136aa4b96e91da1a661b0b5d2b07

Conflicts:
	init.hammerhead.rc