loader: autoload_font will hung loader when there is no local console

If we start with console set to comconsole, the local
console (vidconsole, efi) is never initialized and attempt to
use the data can render the loader hung.

(cherry picked from commit 61c50cbc096d28e44cb8b627e524ae58158c423a)

Reported by: Kamigishi Rei
Approved by: re (gjb)