Revert "mm-video: Use actual kernel headers for all builds"

This reverts commit 2ab282b22d58f9cacc8fad1daba321b5d0c9fd01.
Revert "mm-core: Add key for HFR encoding"

This reverts commit a983eede4af380321c411d3cf1b95c7c446113b1.
Revert "mm-core: Add kKeySmoothStreaming"

This reverts commit 9d4b717a3972448ee6c675bdaf33dd0292b235d9.