[iDMR] Using MII-related commands on iDRM board doesn't work now (e.g.,

"mii device" results in "Unexpected exception"). Fixing this properly
requires some clean-up in the FEC drivers infrastructure for ColdFire, so
this commit disables MII commads for now.

include/configs/idmr.h

@@ -83,8 +83,7 @@
  */
 #define CONFIG_COMMANDS		((CONFIG_CMD_DFL		| \
 					CFG_CMD_PING		| \
-					CFG_CMD_NET		| \
-					CFG_CMD_MII)		& \
+					CFG_CMD_NET)		& \
 					~(CFG_CMD_LOADS		| \
 						CFG_CMD_LOADB))
 
@@ -194,4 +193,9 @@
 
 /* Port configuration */
 #define CFG_FECI2C		0xF0
+
+#if (CONFIG_COMMANDS & CFG_CMD_MII)
+#error MII commands don't work on iDMR board and sholud not be enabled.
+#endif /* (CONFIG_COMMANDS & CFG_CMD_MII) */
+
 #endif /* _IDMR_H */