egl_dri2: Add support for EGL_KHR_create_contest when using swrast

This requires swrast version >= 3. Also EGL_EXT_create_context_robostness
is supported if __DRI2_ROBUSTNESS extension is found.

Reference: https://bugs.freedesktop.org/show_bug.cgi?id=80821
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com>
diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 3434862..eb56113 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -589,7 +589,8 @@
                                    __DRI2_RENDERER_HAS_FRAMEBUFFER_SRGB))
       disp->Extensions.KHR_gl_colorspace = EGL_TRUE;
 
-   if (dri2_dpy->dri2 && dri2_dpy->dri2->base.version >= 3) {
+   if ((dri2_dpy->dri2 && dri2_dpy->dri2->base.version >= 3) ||
+       (dri2_dpy->swrast && dri2_dpy->swrast->base.version >= 3)) {
       disp->Extensions.KHR_create_context = EGL_TRUE;
 
       if (dri2_dpy->robustness)