Makefile: Add support to convert from DVBv5 to DVBv3

That does the conversion from a previously generated DVBv5
directory back to DVBv3.

This is useful to check if dvb-fe-convert is doing the right
thing.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Makefile

@@ -13,13 +13,24 @@
 MKDIR = mkdir -p
 DVBFORMATCONVERT = dvb-format-convert
 
-DVBFORMATCONVERT_CHANNEL_DVBV5 = -ICHANNEL -ODVBV5
-
 DVBV3DIRS = atsc dvb-c dvb-s dvb-t
+
 DVBV3CHANNELFILES = $(foreach dir,$(DVBV3DIRS),$(wildcard $(dir)/*))
 
+DVBFORMATCONVERT_CHANNEL_DVBV5 = -ICHANNEL -ODVBV5
+DVBFORMATCONVERT_CHANNEL_DVBV3 = -IDVBV5 -OCHANNEL
+
+DVBV3OUTPUTDIR = dvbv3
 DVBV5OUTPUTDIR = dvbv5
 
 makedvbv5:
 	@$(foreach var,$(DVBV3DIRS), $(MKDIR) $(DVBV5OUTPUTDIR)/$(var);)
 	@$(foreach var,$(DVBV3CHANNELFILES), $(DVBFORMATCONVERT) $(DVBFORMATCONVERT_CHANNEL_DVBV5) $(var) $(DVBV5OUTPUTDIR)/$(var);)
+
+makedvbv3:
+	@$(foreach var,$(DVBV3DIRS), $(MKDIR) $(DVBV3OUTPUTDIR)/$(var);)
+	@$(foreach var,$(DVBV3CHANNELFILES), $(DVBFORMATCONVERT) $(DVBFORMATCONVERT_CHANNEL_DVBV3) $(DVBV5OUTPUTDIR)/$(var) $(DVBV3OUTPUTDIR)/$(var);)
+
+
+clean:
+	rm -rf $(DVBV3OUTPUTDIR)/ $(DVBV5OUTPUTDIR)/