xorg-server: add dependency on dri2proto when systemd is built

When systemd is selected, xorg-server must have config-udev-kms
enabled in order to build correctly, but it won't be the case if
BR2_PACKAGE_XPROTO_DRI2PROTO is not part of the build.

Add BR2_PACKAGE_XPROTO_DRI2PROTO as a dependency of xorg-xserver
only when systemd is part of the build.

Fixes bug #9486.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Tested-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit cd4af31dd86c475482770f9ce9ccb583485c6449)

package/x11r7/xserver_xorg-server/Config.in

@@ -48,6 +48,7 @@ config BR2_PACKAGE_XSERVER_XORG_SERVER
 	select BR2_PACKAGE_XPROTO_XPROTO
 	select BR2_PACKAGE_XUTIL_UTIL_MACROS
 	select BR2_PACKAGE_XKEYBOARD_CONFIG
+	select BR2_PACKAGE_XPROTO_DRI2PROTO if BR2_PACKAGE_SYSTEMD
 	help
 	  X.Org X server
 

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

@@ -73,7 +73,9 @@ ifeq ($(BR2_PACKAGE_SYSTEMD),y)
 XSERVER_XORG_SERVER_CONF_OPTS += \
 	--with-systemd-daemon \
 	--enable-systemd-logind
-XSERVER_XORG_SERVER_DEPENDENCIES += systemd
+XSERVER_XORG_SERVER_DEPENDENCIES += \
+	systemd \
+	xproto_dri2proto
 else
 XSERVER_XORG_SERVER_CONF_OPTS += \
 	--without-systemd-daemon \