Revert "Refactor code acc. to szezso's commits..."

This reverts commit b73c2e94879e91ca5e68295eb1593eda7a7627ac.
Make this a device specific repo
Remove unused stuff in common.mk
Get stuff from old display-legacy
Fix up stuff, use some old functions, get camera working (till preview!)

and, hell lot of W/QualcommCameraHardware7225a(  112): MemoryCacheFlush : fd 44 size 3145732 PMEM_CACHE_FLUSH error Invalid argument (22)

in logcat... to fix ;)