ARM: dts: msm: add lt9611 support for qcs605 camera

qcs605 camera uses LT9611 as the DSI to HDMI bridge chip.
DSI bridge device is working like a DSI client so add the
device tree changes to support this bridge device.

CRs-Fixed: 2140653
Change-Id: Ia5d489c7665496e29511847ada50a8a6db2e22e2
Signed-off-by: Ray Zhang <rayz@codeaurora.org>