package/stellarium: fix build without qt5serialport

Set USE_PLUGIN_TELESCOPECONTROL depending on qt5serialport availability

Fixes:
 - http://autobuild.buildroot.org/results/01452113e984de0ddf177a513d20287c96ebe0a3

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/stellarium/stellarium.mk

@@ -30,9 +30,13 @@ STELLARIUM_DEPENDENCIES += qt5serialport
 ifeq ($(BR2_PACKAGE_GPSD),y)
 STELLARIUM_DEPENDENCIES += gpsd
 endif
-STELLARIUM_CONF_OPTS += -DENABLE_GPS=ON
+STELLARIUM_CONF_OPTS += \
+	-DENABLE_GPS=ON \
+	-DUSE_PLUGIN_TELESCOPECONTROL=ON
 else
-STELLARIUM_CONF_OPTS += -DENABLE_GPS=OFF
+STELLARIUM_CONF_OPTS += \
+	-DENABLE_GPS=OFF \
+	-DUSE_PLUGIN_TELESCOPECONTROL=OFF
 endif
 
 $(eval $(cmake-package))