mach-venturi: Adjust MFC reserve MEM for OMX chanages.

-Tweaked the amount of requested memory in OMX.
Revert "mach-venturi: Use stock LCD voltages."

-Restored stock values in the course of troubleshooting
SOD's. This had nothing to do with it, so putting it back.

This reverts commit 5644e0f5561ab3c8ee50fe23fe53cc50ac1042a6.