venc: Disable ION when BOARD_USES_PMEM_ADSP is enabled

Signed-off-by: Sultanxda <sultanxda@gmail.com>
venc: Fix compilation when ION is disabled

Signed-off-by: Sultanxda <sultanxda@gmail.com>
mm-video: vdec: Fix memory leak in color converter.

When OMX is deinitialized, the color converter buffers stay intact, causing the
available memory pool to have less continuous space available.

Change-Id: Icc2d730d540bae153c9fde36a6f4267ff3f9f088