Refactor the common settings for device tree node 'fec' into the generic
phycore i.MX6 device tree file. This avoid redundant settings and makes
common fixes easier. Our kernel device tree files have the same layout.
Signed-off-by: Stefan Lengfeld <s.lengfeld@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>