package/rauc-hawkbit-updater: add systemd optional dependency

Take the systemd into account if present.

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk

@@ -12,4 +12,11 @@ RAUC_HAWKBIT_UPDATER_LICENSE_FILES = LICENSE
 RAUC_HAWKBIT_UPDATER_DEPENDENCIES = json-glib libcurl
 RAUC_HAWKBIT_UPDATER_CFLAGS = $(TARGET_CFLAGS) -std=c99
 
+ifeq ($(BR2_PACKAGE_SYSTEMD),y)
+RAUC_HAWKBIT_UPDATER_DEPENDENCIES += systemd
+RAUC_HAWKBIT_UPDATER_CONF_OPTS += -Dsystemd=enabled
+else
+RAUC_HAWKBIT_UPDATER_CONF_OPTS += -Dsystemd=disabled
+endif
+
 $(eval $(meson-package))