board: Use TARGET_CPU_VARIANT
u8500-common: Disable gpu-to-cpu path

This is needed as a part of the bring back for mheap screeshot code:

http://review.cyanogenmod.org/#/c/46246/
overlay: Remove unused Camera overlay (Flash fix?)
overlay: Use fade animation on screen off animation instead of CRT
media: Disable STE soft plugins

Now they fail all the time on some CHECK_EQ from OMXCodec and since google ones works pretty well, I do not want to start ifndef checks and this codecs are too outdated, I feel to lazy to investigate them.
overlay: Fix flash order on camera app and bring back support for Torch interface