[PATCH] ipw2200: do not sleep in ipw_request_direct_scan

Drivers should not sleep for very long inside an ioctl -
so return EAGAIN and let wpa_supplicant handle the problem.

Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>