xserver_xorg-server: fix CONF_OPTS

Signed-off-by: Sagaert Johan <sagaert.johan@proximus.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xserver_xorg-server/xserver_xorg-server.mk

@@ -65,12 +65,12 @@ XSERVER_XORG_SERVER_CONF_OPTS = \
 	--$(if $(BR2_PACKAGE_XSERVER_XORG_SERVER_XVFB),en,dis)able-xvfb
 
 ifeq ($(BR2_PACKAGE_SYSTEMD),y)
-XSERVER_XORG_CONF_OPTS += \
+XSERVER_XORG_SERVER_CONF_OPTS += \
 	--with-systemd-daemon \
 	--enable-systemd-logind
 XSERVER_XORG_SERVER_DEPENDENCIES += systemd
 else
-XSERVER_XORG_CONF_OPTS += \
+XSERVER_XORG_SERVER_CONF_OPTS += \
 	--without-systemd-daemon \
 	--disable-systemd-logind
 endif