USB: New device ID for ftdi_sio usb serial driver

The patch adds a new device ID for the Gamma Scout Geiger counter
device.

Signed-off-by: Ralf Schlatterbeck <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/serial/ftdi_sio.c

···
 	{ USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
 	{ USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
 	{ },					/* Optional parameter entry */
 	{ }					/* Terminating entry */
 };

drivers/usb/serial/ftdi_sio.h

···
 #define TESTO_VID			0x128D
 #define TESTO_USB_INTERFACE_PID		0x0001
 
+/*
+ * Gamma Scout (http://gamma-scout.com/). Submitted by [e-mail].
+ */
+#define FTDI_GAMMA_SCOUT_PID		0xD678	/* Gamma Scout online */
+
 /* Commands */
 #define FTDI_SIO_RESET 		0 /* Reset the port */
 #define FTDI_SIO_MODEM_CTRL 	1 /* Set the modem control register */