Use real iomuxc values rather than preserving the boot loader value for
the SOMs ethernet.
Suggested-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>