ARM: dts: apq8084: Add IPC ROUTER device tree configuration

Add IPC router and IPC router transport device tree configuration to
provide information regarding the links, link characteristics, network
topology.

Change-Id: I5a691257b608dd85f7dc19bc478204b1a87725f3
Signed-off-by: Brent Hronik <bhronik@codeaurora.org>
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>