Revert "ARM: dts: msm: remove DisplayPort from connector list on kona"

This reverts commit 8db33875.

This change allows the DisplayPort connector to be initialized
in the DRM framework.

Change-Id: Ia6f2586b644531e208ed03a373b4d8951c5ab3da
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>