This patch converts Race America to MMC3 mapper.
Took Race America (U) [hM04].nes from GoodNes as a base and fixed it.
File: Race America (U) [!].nes
CRC32: C503FB78
MD5: BEB6CB6FF988590B8268F95E7FBE0C2B
SHA-1: D1CA82D85E17324994ED1F8D5510B8EE5BD19377