mm-video-v4l2: vidc: vdec: Add OMX MVC codec

Add a new OMX MVC codec. MVC buffer requirements are different
than other codecs, each output buffer contain two full size
views as oppose to stereoscopic 3D where the two views are
embedded in a regular frame. MVC buffer size is around the
double than regular codec and uses a specific layout for the
views for these reasons a new color format is introduce.
MVC codec will support only top-bottom views layout, the top
view represents the left side.

Change-Id: Idbbec6932d56d8074636fb696dc982f0ef014288