nes: add "NES-TR1ROM" to TVROM, should emulate identically (except for differences in MMC3 variant, which are handled). like "NES-TVROM", bootgod id only, as iNES is too crappy for this. should fix some version of Gauntlet (U), but can't test as I don't have the rom.

BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/TVROM.cs

@@ -15,6 +15,8 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 					AssertPrg(64); AssertChr(64); AssertVram(8); AssertWram(0);
 					AssertBattery(false);
 					break;
+				case "NES-TR1ROM": // Gauntlet variant (untested!)
+					break;
 				default:
 					return false;
 			}