mm-video-v4l2: Add capabilties to extradata port

Extradata port should differ from the output port only
in buffer count and size, all other capalities like width,
height should be same as output port. Made changes for
the same.

CRs-Fixed: 2140136
Change-Id: I96eab880de53f89346dde63b3f77bc3c48ca20aa
1 file changed