ARM: dts: LogicPD Torpedo: Add WiLink UART node

Add a node for the UART part of WiLink chip.

This is compile tested only!

Cc: Adam Ford <aford173@gmail.com>
Acked-by: Adam Ford <aford173@gmail.com>
Tested-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>