USB: serial: ftdi_sio: add support for Yaesu SCU-18 cable

Harald Linden reports that the ftdi_sio driver works properly for the
Yaesu SCU-18 cable if the device ids are added to the driver.  So let's
add them.

Reported-by: Harald Linden <harald.linden@7183.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index a5a0376..8c660ae 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -824,6 +824,7 @@
 	{ USB_DEVICE(FTDI_VID, FTDI_TURTELIZER_PID),
 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_USB60F) },
+	{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_SCU18) },
 	{ USB_DEVICE(FTDI_VID, FTDI_REU_TINY_PID) },
 
 	/* Papouch devices based on FTDI chip */