board/T104xrdb: T1040 FMAN ports FM1@DTSEC1 and FM1@DTSEC2 have no PHYs

board/T104xrdb: T1040 FMAN ports FM1@DTSEC1 and FM1@DTSEC2 have no PHYs

Freescale's T1040qds board may be configured to have up to
5 FMAN ports (FM1@DTSEC1 to FM1@DTSEC5). From these 5 ports,
2 of them may be fixed-links (FM1@DTSEC1 annd FM1@DTSEC2),
connected to other two ports from an intergrated
VSC9953 L2 Switch (switch ports 8 and 9). These fixed-link
ports have no PHYs attatched, so they don't have a
corresponding MDIO.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>