mm-video-v4l2: Don't append extradata size to output buffer size

Get rid of additional extradata size. Earlier video driver calc-
ulated buffer size based on size returned by video firmware. Now
with the video driver calculating the buffer size based on Venus
size macros exposed to client, the calculated buffer size
includes the extradata size.

CRs-Fixed: 1047374
Change-Id: I1f9a1fd12aaca1430e15dcd11ddc90cea1d58daa
1 file changed