package/mesa3d: fix glvnd option handling

- enable glvnd option only in case OPENGL_GLX or OPENGL_EGL is enabled

Fixes:

  - http://autobuild.buildroot.net/results/e97ad48f20a325f5757754a8be2bdb613c86e4ea

  .../build/mesa3d-21.3.3/meson.build:542:4: ERROR: Problem encountered: glvnd requires DRI based GLX and/or EGL

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/mesa3d/mesa3d.mk

@@ -271,10 +271,14 @@ MESA3D_CFLAGS += -mlong-jump-table-offsets
 endif
 
 ifeq ($(BR2_PACKAGE_LIBGLVND),y)
+ifneq ($(BR2_PACKAGE_MESA3D_OPENGL_GLX)$(BR2_PACKAGE_MESA3D_OPENGL_EGL),)
 MESA3D_DEPENDENCIES += libglvnd
 MESA3D_CONF_OPTS += -Dglvnd=true
 else
 MESA3D_CONF_OPTS += -Dglvnd=false
 endif
+else
+MESA3D_CONF_OPTS += -Dglvnd=false
+endif
 
 $(eval $(meson-package))