egl: image_dma_buf_export - use KHR 64-bit type

After talking to Jon Leech he suggested this should be fine.

update spec to the version in the registry.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 34d6bfe..1e843ed 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -1996,7 +1996,7 @@
 dri2_export_dma_buf_image_query_mesa(_EGLDriver *drv, _EGLDisplay *disp,
                                      _EGLImage *img,
                                      EGLint *fourcc, EGLint *nplanes,
-                                     EGLuint64MESA *modifiers)
+                                     EGLuint64KHR *modifiers)
 {
    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
    struct dri2_egl_image *dri2_img = dri2_egl_image(img);