parport_unregister_port() is split; parport_remove_port() does
what parport_unregister_port() used to do sans the final parport_put_port()
call.
	Callers updated; many of them needed only parport_put_port() (failure
exit paths where we never had the port announced to drivers).
	Fixed multiple races on port removal by shifting parport_remove_port()
in front of the code that releases irq/io ports/etc.