Input: introduce usb_to_input_id() to uniformly produce
       struct input_id for USB input devices.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/usb/input/touchkitusb.c b/drivers/usb/input/touchkitusb.c
index 386595e..4276c24 100644
--- a/drivers/usb/input/touchkitusb.c
+++ b/drivers/usb/input/touchkitusb.c
@@ -35,7 +35,7 @@
 #define DEBUG
 #endif
 #include <linux/usb.h>
-
+#include <linux/usb_input.h>
 
 #define TOUCHKIT_MIN_XC			0x0
 #define TOUCHKIT_MAX_XC			0x07ff
@@ -202,10 +202,7 @@
 
 	touchkit->input.name = touchkit->name;
 	touchkit->input.phys = touchkit->phys;
-	touchkit->input.id.bustype = BUS_USB;
-	touchkit->input.id.vendor = le16_to_cpu(udev->descriptor.idVendor);
-	touchkit->input.id.product = le16_to_cpu(udev->descriptor.idProduct);
-	touchkit->input.id.version = le16_to_cpu(udev->descriptor.bcdDevice);
+	usb_to_input_id(udev, &touchkit->input.id);
 	touchkit->input.dev = &intf->dev;
 
 	touchkit->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);