package/gpsd: add skytraq option

skytraq support has been added in version 3.17 with
https://git.savannah.gnu.org/cgit/gpsd.git/commit/SConstruct?id=1456c9f50e718a394f2b633cf0773f3fd792cdaa

Allow the user to enable/disable it through an option and disable it
by default.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gpsd/Config.in

@@ -222,6 +222,11 @@ config BR2_PACKAGE_GPSD_SIRF
 	help
 	  SiRF binary support
 
+config BR2_PACKAGE_GPSD_SKYTRAQ
+	bool "Skytraq"
+	help
+	  Skytraq support
+
 config BR2_PACKAGE_GPSD_SUPERSTAR2
 	bool "SuperStarII"
 	help

package/gpsd/gpsd.mk

@@ -144,6 +144,9 @@ endif
 ifneq ($(BR2_PACKAGE_GPSD_SIRF),y)
 GPSD_SCONS_OPTS += sirf=no
 endif
+ifneq ($(BR2_PACKAGE_GPSD_SKYTRAQ),y)
+GPSD_SCONS_OPTS += skytraq=no
+endif
 ifneq ($(BR2_PACKAGE_GPSD_SUPERSTAR2),y)
 GPSD_SCONS_OPTS += superstar2=no
 endif