digsy MTC: Add 'mtc' command.

New command allows to:
     o check FW version
     o set LED status
     o set digital output status
     o get digital input status

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
diff --git a/board/digsy_mtc/digsy_mtc.c b/board/digsy_mtc/digsy_mtc.c
index cc6087b..9d77e54 100644
--- a/board/digsy_mtc/digsy_mtc.c
+++ b/board/digsy_mtc/digsy_mtc.c
@@ -240,6 +240,7 @@
 
 int misc_init_r(void)
 {
+	extern int mtc_cmd_init_r (void);
 	uchar enetaddr[6];
 
 	if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
@@ -247,6 +248,7 @@
 		eth_setenv_enetaddr("ethaddr", enetaddr);
 	}
 
+	mtc_cmd_init_r();
 	return 0;
 }