[BUILD] conditionally compile common/cmd_*.c in common/Makefile

Modify common/Makefile to conditionally compile the cmd_*.c files based
on the board config.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

common/cmd_console.c

@@ -28,8 +28,6 @@
 #include <command.h>
 #include <devices.h>
 
-#if defined(CONFIG_CMD_CONSOLE)
-
 extern void _do_coninfo (void);
 int do_coninfo (cmd_tbl_t * cmd, int flag, int argc, char *argv[])
 {
@@ -67,5 +65,3 @@ U_BOOT_CMD(
 	"coninfo - print console devices and information\n",
 	""
 );
-
-#endif