This commit adds the required pin muxing for the network interfaces and
the MDIO interface to be properly initialized. For instance, this makes
it possible for a bootloader to initialize and access the network interfaces

Only the second network interface is pin muxed. The first network interface is
connected to the PHY using SGMII, which uses a dedicated SerDes lane.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1407759281-11513-7-git-send-email-ezequiel.garcia@free-electrons.comSigned-off-by: Jason Cooper <jason@lakedaemon.net>