Robert A. Woods, 80, a retired founding partner in the communications law firm of Schwartz, Woods & Miller, died Dec. 22  following a long illness. The firm handled FCC and other matters for numerous public broadcasting stations as well as for common carriers and commercial broadcasters. Woods served as outside general counsel for the National Association of Educational Broadcasters in its later years. In cities where there were no suitable TV channels reserved for noncommercial use, Woods went into battle.