ARM: dts: qca402x: adds dts entry for qca402

Add device entry for qca402x Host Target communication device for high
level data transfer via QCA402x Quartz Wifi SoC.

Change-Id: I9f62c3fdff7907287b6fa74b8934375f58c65fd9
Signed-off-by: Petar Sivenov <psiven@codeaurora.org>