ARM: dts: kirkwood: set Guruplug phy-connection-type to rgmii-id

Ethernet PHYs found on Globalscale Guruplug are connected by RGMII-ID.
Set the corresponding phy-connection-type property accordingly.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1398862602-29595-16-git-send-email-sebastian.hesselbarth@gmail.com


Signed-off-by: Jason Cooper <jason@lakedaemon.net>