ARM: dts: msm: add topologies for panels supported with sdm845 target

This change enumerates and lists the display topologies supported by
the panels for sdm845 target. It also cleans up the panel dtsi to
move the common DSC nodes information to the parent node.

Change-Id: I3c58b84f122adba381b59a20e04bc6db2692ec62
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>