gba: add goomba emulator autoloading for gb/gbc roms.

cheats.cpp

@@ -352,15 +352,8 @@ static void cheats_send()
 
 	user_io_set_index(255);
 
-	// prepare transmission
 	user_io_set_download(1);
-
-	EnableFpga();
-	spi8(UIO_FILE_TX_DAT);
-	spi_write(buff, pos ? pos : 2, fpga_get_fio_size());
-	DisableFpga();
-
-	// signal end of transmission
+	user_io_file_tx_write(buff, pos ? pos : 2);
 	user_io_set_download(0);
 }