maple: don't crash on invalid maple device. Just ignore it

Fixes MINIDUMP-A9C

core/hw/maple/maple_cfg.cpp

@@ -227,7 +227,8 @@ static void mcfg_Create(MapleDeviceType type, u32 bus, u32 port, s32 player_num
 		}
 	}
 	std::shared_ptr<maple_device> dev = maple_Create(type);
-	dev->Setup(bus, port, player_num);
+	if (dev != nullptr)
+		dev->Setup(bus, port, player_num);
 }
 
 static void createNaomiDevices()

core/hw/maple/maple_devs.cpp

@@ -1891,7 +1891,6 @@ std::shared_ptr<maple_device> maple_Create(MapleDeviceType type)
 
 	default:
 		ERROR_LOG(MAPLE, "Invalid device type %d", type);
-		die("Invalid maple device type");
 		break;
 	}
 	return nullptr;