Rename the device ID macro for the second version of KYE MousePen i608x
graphics tablet to have "V" in its name to signify that "2" is a
version.

I.e. USB_DEVICE_ID_KYE_MOUSEPEN_I608X_2 ->
     USB_DEVICE_ID_KYE_MOUSEPEN_I608X_V2

This also makes applying additional fixes from DIGImend easier.
Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>