USB: serial: add Google simple serial SubClass support

Add support for Google devices that export simple serial
interfaces using the vendor specific SubClass/Protocol pair
0x50/0x01.

Signed-off-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
[johan: move id entries and update Kconfig]
Signed-off-by: Johan Hovold <johan@kernel.org>
diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index d185613..b7cf198 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -60,6 +60,7 @@
 		- Suunto ANT+ USB device.
 		- Medtronic CareLink USB device
 		- Fundamental Software dongle.
+		- Google USB serial devices
 		- HP4x calculators
 		- a number of Motorola phones
 		- Novatel Wireless GPS receivers