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 OTOH, CONFIG_TARGET_FCDEV3B is being brought back: with our earlier FC modem family idea now being withdrawn in light of the discovery of Tango modules, FCDEV3B goes back to being its own unique target.

/* trivial reconstruction from disassembly */

Application_Initialize()
{
	Init_Target();
	Init_Drivers();
	Cust_Init_Layer1();
	Init_Serial_Flows();
	StartFrame();
	Init_Unmask_IT();
}