Reverted : mach-midas: Add a static cma region declaration for MFC (video playback broken)

Samsung apparently forgot this in the update 7 sources.

Credits to AndreiLux

https://github.com/AndreiLux/Perseus-S3/commit/71cbea158ae5f003412c39b20d1699b5524840fe (reverse-merged from commit 141f926daa39ce7a800a758cd3aa1706603b616d)