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/Makefile b/board/digsy_mtc/Makefile
index 7d659e5..0bededc 100644
--- a/board/digsy_mtc/Makefile
+++ b/board/digsy_mtc/Makefile
@@ -7,7 +7,7 @@
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o
+COBJS	:= $(BOARD).o cmd_mtc.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))