rfkill: add the GPS radio type

Althoug GPS is a technology w/o transmitting radio
and thus not a primary candidate for rfkill switch,
rfkill gives unified interface point for devices with
wireless technology.

The input key is not supplied as it is too be deprecated.

Cc: johannes@sipsolutions.net
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/linux/rfkill.h

@@ -47,6 +47,7 @@ enum rfkill_type {
 	RFKILL_TYPE_UWB,
 	RFKILL_TYPE_WIMAX,
 	RFKILL_TYPE_WWAN,
+	RFKILL_TYPE_GPS,
 	NUM_RFKILL_TYPES,
 };