ARM: dts: Add support for OMAP4 Gumstix DuoVero/Parlor

Gumstix DuoVero is an OMAP4430-based Computer On Module.
Parlor is one of the available expansion board.

Tested features:
- GPMC ethernet
- HSUSB2 and OTG
- Audio out
- WiFi and Bluetooth (w2cbw0015 SDIO module)
- LED and button

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Tony Lindgren <tony@atomide.com>