msm: mdss: Add support to configure the video mode interleave bit

Some video mode panels need to have the command mode
operation interleaved on the last line of the video stream.
Add support to enable this register via a panel dtsi property.

Change-Id: I3dfe36816d7602da4f66d09ea23ac9c6185f9858
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>