media: gscaler: Add hack to swap Cr and Cb order

* For some reason userspace is expecting the order of the format to be
  the other way around. This is a nasty hack to fix the ordering, a
  proper fix would be to identify and fix the mismatch.
exynos: universal5420: Support legacy LPM param

Change-Id: I7536b279d9c5a62175e5b23ccbbfbedfbf5643e4