net: removed board-specific CONFIGs from MPC5xxx FEC driver

Added new CONFIG options for the three type of MAC-PHY interconnect and
applied them all relevant board config files

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/include/configs/mucmc52.h b/include/configs/mucmc52.h
index 2f48a0f..ae60cd2 100644
--- a/include/configs/mucmc52.h
+++ b/include/configs/mucmc52.h
@@ -225,6 +225,7 @@
  * Ethernet configuration
  */
 #define	CONFIG_MPC5xxx_FEC	1
+#define CONFIG_MPC5xxx_FEC_MII100
 #define	CONFIG_PHY_ADDR		0x00
 #define	CONFIG_MII		1		/* MII PHY management		*/