mako: Overlap secure and non secure video firmware heaps.

board-8064 msm: Overlap secure and non secure video firmware heaps.
Hanumant Singh <hanumant@codeaurora.org>

Moves fixed area start address down, so that non secure
video firmware heap and secure video firmware area overlap.
Both use the region in a mutually exclusive manner.
ALso introduce a hole, that can be used by MM heap
lock down for content protection.

Change-Id: Icb653f3c0968e7cdc08edca85049ad3bb355cb70