Revert "camerawrapper: more merges from oppo5's repo"

This reverts commit 8af0a08d7016a2cf5bc2877c32cedabed6ed49b0.
camerawrapper: revert a couple changes to try and fix dark preview

Change-Id: I5b672c41a382ab8fe9d1518ca2b1ebb8b390215d
BoardConfig: Change cpu variant back to cortex-a8, Lets see how this goes

I've been seeing this be done on a few different repos and it's one of the
last things I haven't tried.

Change-Id: I5a8106e771e48e8324952e053473e545f991ef59