egl/wayland/sw: move swrast_update_buffers() directly into swapbuffers

no functional changes

Acked-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27703>

src/egl/drivers/dri2/platform_wayland.c

@@ -2465,7 +2465,6 @@ dri2_wl_swrast_put_image2(__DRIdrawable *draw, int op, int x, int y, int w,
 
    assert(copy_width <= stride);
 
-   (void)swrast_update_buffers(dri2_surf);
    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
 
    /* partial copy, copy old content */
@@ -2513,6 +2512,9 @@ dri2_wl_swrast_swap_buffers_with_damage(_EGLDisplay *disp, _EGLSurface *draw,
    if (!dri2_surf->wl_win)
       return _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_swap_buffers");
 
+   if (!disp->Options.Zink)
+      (void)swrast_update_buffers(dri2_surf);
+
    if (n_rects)
       dri2_dpy->core->swapBuffersWithDamage(dri2_surf->dri_drawable, n_rects, rects);
    else