package/x11r7/xdriver_xf86-video-tdfx: disable DRI support when not available

Fixes
http://autobuild.buildroot.net/results/304/304b68d14da026755d9d9323ed60f4f86adc7a96/
http://autobuild.buildroot.net/results/2b2/2b2558661850db295e670edfb5943973e93e01e4/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xdriver_xf86-video-tdfx/xdriver_xf86-video-tdfx.mk

@@ -21,4 +21,8 @@ XDRIVER_XF86_VIDEO_TDFX_DEPENDENCIES = \
 	xproto_xproto \
 	xserver_xorg-server
 
+ifeq ($(BR2_PACKAGE_MESA3D_DRI_DRIVER),)
+XDRIVER_XF86_VIDEO_TDFX_CONF_OPTS = --disable-dri
+endif
+
 $(eval $(autotools-package))