ARM: dts: Update the MDSS DT configuration for 8916

Add the missing DT entries for 8916 MDSS and make sure that
the configuration is inline with other MDSS revisions.

Change-Id: Ibf8a198fa77dc86e9838b0526216dff70ed04b9e
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>