MX31: Add support to update FPGA bitstream

The patch adds the possibility to update the QONG
FPGA (a Lattice XP2-5E) with u-boot using some GPIOs
to drive the JTAG interface.

Signed-off-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/davedenx/qong/Makefile b/board/davedenx/qong/Makefile
index 93e1985..ada6e03 100644
--- a/board/davedenx/qong/Makefile
+++ b/board/davedenx/qong/Makefile
@@ -27,7 +27,7 @@
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= qong.o
+COBJS	:= qong.o fpga.o
 SOBJS	:= lowlevel_init.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)