drivers: media: update format in s_dv_timing

drivers: media: update format in s_dv_timing

Update channel format in s_dv_timing which is
required for HDMI IN case

bug 200169351

Change-Id: I3f9926f861c26e019cf2496dfaf230a95f0a7280
Signed-off-by: Ahung Cheng <ahcheng@nvidia.com>
(cherry picked from commit 2a130a9adbd6b622e26025be15c54544f1bef5cd)
Reviewed-on: http://git-master/r/1116541
Signed-off-by: Bryan Wu <pengw@nvidia.com>
Reviewed-on: http://git-master/r/1141850
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Jihoon Bang <jbang@nvidia.com>