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
Signed-off-by: Evan Anderson <evan1124@gmail.com>

Conflicts:
	BoardConfig.mk