Adds support of Famicom 4-Player Adapter (NES four-score support saved).
Database match: R.C. Pro-Am II (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 8C68582BDAA32FBC8C7CD858991D4E00D3B1569C
File CRC32: 3DB5562
ROM SHA-1: FA189FC0F9277D5765E5DE19274AFBD28660F076
ROM CRC32: 9EDD2159