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/PM520.h b/include/configs/PM520.h
index e250e03..ff73ef9 100644
--- a/include/configs/PM520.h
+++ b/include/configs/PM520.h
@@ -279,10 +279,11 @@
  * Ethernet configuration
  */
 #define CONFIG_MPC5xxx_FEC	1
+#define CONFIG_MPC5xxx_FEC_MII100
 /*
- * Define CONFIG_FEC_10MBIT to force FEC at 10Mb
+ * Define CONFIG_MPC5xxx_FEC_MII10 to force FEC at 10Mb
  */
-/* #define CONFIG_FEC_10MBIT 1 */
+/* #define CONFIG_MPC5xxx_FEC_MII10 */
 #define CONFIG_PHY_ADDR		0x00
 
 /*