Disable network support on cmi_mpc5xx board

..because it caused compiler errors and there seems to be no
board maintainer to take care of this.
Signed-off-by: NWolfgang Denk <wd@denx.de>

include/configs/cmi_mpc5xx.h

@@ -59,6 +59,8 @@
  */
 #include <config_cmd_default.h>
 
+#undef	CONFIG_CMD_NET		/* disabeled - causes compile errors */
+
 #define CONFIG_CMD_MEMORY
 #define CONFIG_CMD_LOADB
 #define CONFIG_CMD_REGINFO