msm7x27a-common: enable zram by default

Change-Id: I20dd13ad03c3592282828b692c6c190236df98fb
msm7x27a-common: camera: clean up wrapper code, fix possible memory leak

* Clean up formatting, warnings, style, etc.

Change-Id: Ie0757befa341e209e2b552b42bffee6b52d8df0a