ARM: dts: msm: enable dynamic fps for SDM845

Enabling dynamic fps for nt35597 dsc and nt35597 dual dsi
video panels on sdm845. This helps to reduce fps
when static screen leading to power saving.

Change-Id: Ieea6600a13992ca4678068b0d6f474a87052a8b3
Signed-off-by: Raviteja Tamatam <travitej@codeaurora.org>