loader: ficl: restore isvirtualized?

This word was accidentally removed when gfx bindings were made optional
to remove some overhead not needed for all loaders. This one isn't
graphics related, so we can safely restore it without irritating anyone.

Reported by: sjg
Reviewed by: adrian, imp
Fixes: 9c8bf69a53f ("loader: Only create gfx 4th bindings when [...]")

(cherry picked from commit 354fb783e6d5ff9abcb6529cbb17cbb2ff6a7375)