gpsd: nmea2000 requires aivdm support

Fixes:
http://autobuild.buildroot.org/results/853cac5becf9d071c6ec1181e1e951bc8e7d80d5/build-end.log
and tons of identical build failures.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/gpsd/Config.in

@@ -169,6 +169,7 @@ config BR2_PACKAGE_GPSD_NMEA
 config BR2_PACKAGE_GPSD_NMEA2000
 	bool "NMEA2000"
 	select BR2_PACKAGE_GPSD_NAVCOM
+	select BR2_PACKAGE_GPSD_AIVDM
 	help
 	  NMEA2000/CAN support