Camera: Temporarily migrating the preview buffer allocation
 to smi on 8x60

The preview buffer allocation on 8x60 is temporarily migrated to smi memory because there
is a bug with the ebi memory region. The Y and CbCr offset get messed up randomly causing
scroll of the preview frames.

Change-Id: Ia9bf618b5ec95c75e66b5839844f1a5048538d2e