drm/msm/sde: fix issue with video mode

This change explicitly passes the encoder id while reserving
the interface resource from the resource manager, without this
change resoure manager returns invalid interface resource.

Change-Id: Ic18ba3561d5e547e7ee9fb09b18d5dbdebb41ea4
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>