staging: vme: tsi148: use list_for_each_safe when deleting resources in .remove

This fixes an oops when removing the module.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Acked-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>