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/inka4x0.h b/include/configs/inka4x0.h
index 405234c..e42fa6d 100644
--- a/include/configs/inka4x0.h
+++ b/include/configs/inka4x0.h
@@ -221,10 +221,11 @@
  * 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
 #define CONFIG_MII