mm-video-v4l2: Fix issue with extradata handling

Call handle_extradata() only once for every FBD,
as for secure usecase, the firmware extradata
buffer is updated with client extradata, and the
second handling will fail. Also move setting
default color space on private handle before
extradata handling.

Change-Id: I951ea056e2132fbab20566ed199603cda9078dc1
1 file changed