dt-bindings: Add INNOLUX P079ZCA panel bindings

The Innolux P079ZCA is a 7.85" panel with a 768X1024 resolution and
connected to DSI using four lanes.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1490316692-20506-1-git-send-email-zyw@rock-chips.com