Kconfig: HSO driver bugfixes and updates

Move the Kconfig for the new "Option" driver so it's not in the
middle of the usbnet-based drivers, so the dependency displays
in the Kconfig user interfaces don't get trashed.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>