egl/dri2: fix error returns on dri2_initialize_x11_dri3 fail

this is a failure path, so return failure

Fixes: 62f65f4bfd ("egl/dri2: if zink is preferred from dri3 skip dri2 paths.")

Acked-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29171>

src/egl/drivers/dri2/platform_x11.c

@@ -1712,7 +1712,9 @@ dri2_initialize_x11_dri3(_EGLDisplay *disp)
 
 cleanup:
    dri2_display_destroy(disp);
-   return status;
+   return status == DRI2_EGL_DRIVER_PREFER_ZINK ?
+          DRI2_EGL_DRIVER_PREFER_ZINK :
+          DRI2_EGL_DRIVER_FAILED;
 }
 #endif