render: remove wlr_ prefix from wlr_renderer_autocreate_with_drm_fd

This function is only required because the DRM backend still needs
to perform multi-GPU magic under-the-hood. Remove the wlr_ prefix
to make it clear it's not a candidate for being made public.

include/render/wlr_renderer.h

@@ -6,7 +6,7 @@
 /**
  * Automatically select and create a renderer suitable for the DRM FD.
  */
-struct wlr_renderer *wlr_renderer_autocreate_with_drm_fd(int drm_fd);
+struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd);
 /**
  * Bind a buffer to the renderer.
  *