amcvideodechybris: Add the divx variant for mpeg4 video

Looks like all the mpeg4 video decoders also accept the divx
variants. So we better add those caps too

Based on a patch by Jorge Zapata <jorgeluis.zapata@gmail.com>,
commit 37df6c1, but ported to amcvideodechybris.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Adding color formats used by Exynos 5 (Nexus 10)

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Merge pull request #4 from rsalveti/master

Improvements for Nexus 10