egl: replace display_name checks with swrast checks

the only time when display_name isn't set is with true swrast

Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30472>

src/egl/drivers/dri2/egl_dri2.h

@@ -630,7 +630,7 @@ dri2_set_WL_bind_wayland_display(_EGLDisplay *disp)
 #ifdef HAVE_WAYLAND_PLATFORM
    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 
-   if (dri2_dpy->device_name && dri2_dpy->image) {
+   if (!dri2_dpy->swrast && dri2_dpy->image) {
       if (dri2_dpy->image->base.version >= 10 &&
           dri2_dpy->image->getCapabilities != NULL) {
          int capabilities;

src/egl/drivers/dri2/platform_x11_dri3.c

@@ -226,7 +226,7 @@ dri3_authenticate(_EGLDisplay *disp, uint32_t id)
 #ifdef HAVE_WAYLAND_PLATFORM
    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 
-   if (dri2_dpy->device_name) {
+   if (!dri2_dpy->swrast) {
       _eglLog(_EGL_WARNING,
               "Wayland client render node authentication is unnecessary");
       return 0;