rfkill: Add missing description for RFKILL_TYPE_GPS

Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJanakiram Sistla <janakiram.sistla@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

include/linux/rfkill.h

@@ -35,6 +35,7 @@
  * @RFKILL_TYPE_UWB: switch is on a ultra wideband device.
  * @RFKILL_TYPE_WIMAX: switch is on a WiMAX device.
  * @RFKILL_TYPE_WWAN: switch is on a wireless WAN device.
+ * @RFKILL_TYPE_GPS: switch is on a GPS device.
  * @NUM_RFKILL_TYPES: number of defined rfkill types
  */
 enum rfkill_type {