targets/fcdev3b.h: bring back CONFIG_TARGET_FCDEV3B C preprocessor symbol CONFIG_TARGET_FCMODEM is no longer used anywhere in our code base, thus it is being fully retired. OTOH, CONFIG_TARGET_FCDEV3B is being brought back: with our earlier FC modem family idea now being withdrawn in light of the discovery of Tango modules, FCDEV3B goes back to being its own unique target.

clean:	FRC
	rm -f fwimage.* ramimage.* str2ind.obj link.cmd link_ram.cmd
	rm -f build_date.* flash-script
	for i in ${SUBDIR}; do (cd $$i; ${MAKE} ${MFLAGS} clean); done