mpc8548cds: Guard old ethernet code with !DM_ETH

There is some code here for the legacy non-DM_ETH case, add a guard
around it.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
1 file changed