ARM: dts: kirkwood: set default pinctrl for GBE1

On Kirkwood, there is only one valid pinctrl setting for GBE1. With
a common SoC pinctrl node, we can now set it in the node instead of
in each board file.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1398862602-29595-9-git-send-email-sebastian.hesselbarth@gmail.com


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