ARM: dts: msm: Add APQ8084 docking station device

Add device node for APQ8084 Liquid docking station. This
will allow GPIOs used to control the USB hub and ethernet
ports to be toggled when the dock is connected.

Change-Id: Ia42181517b26667f3335929f757d9c1123829898
Signed-off-by: Jack Pham <jackp@codeaurora.org>