rknanoutils: add dfu tool

This tool can upload a firmware to the device in DFU mode. The
protocol is the same as the rk27xx devices except that it can
load a bigger (unlimited ?) firmware.

Change-Id: Ic9d4c5087629a9156f9d5d5cdc80767e6359c431

utils/rknanoutils/rkload/Makefile

@@ -0,0 +1,20 @@
+DEFINES=
+CC=gcc
+LD=gcc
+CFLAGS=-O3 -g -std=c99 -W -Wall `pkg-config --cflags libusb-1.0` $(DEFINES)
+LDFLAGS=`pkg-config --libs libusb-1.0`
+BINS=rkloader
+
+all: $(BINS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+sbtoelf: rkloader.o
+	$(LD) -o $@ $^ $(LDFLAGS)
+
+clean:
+	rm -fr *.o
+
+veryclean:
+	rm -rf $(BINS)