msm: mdss: reset ctl interface during video stop

Interface ctl needs to be reset by software during video stop to
prevent hardware's state machine from going into bad state.  One
usecase that causes this to happen is when HDMI interface is
disconnected during video playback and reconnected with left and right
mixers swapped for the 3D muxing.

Change-Id: Ib62e39a8399a4e43c3e44f3ab5e0ad0acd5d77a0
Signed-off-by: Sree Sesha Aravind Vadrevu <svadrevu@codeaurora.org>