mm-video: Recognise "OMX.qcom.video.decoder.divx4" when setting role

Setting the component role for the "OMX.qcom.video.decoder.divx4"
component triggered an incorrect claiming that the component wasn't
recognised. This is a valid component.

Change-Id: Ib58ef8d74dcaaf6bde4bc4a07adca400822e0a11
CRs-Fixed: 759443
mm_video: vidc: Update buffer geometry with stride and scanline

Update buffer geometry dimensions using stride and snanline.
Earlier it was updated conditionally to handle downscalar case.
Now component is fetching all updated dimensions in case of
crop event, so stride and scanline can be used for the same.

Change-Id: If44a6df8498bff2ce39c9428b3708adbee7b8542