softmac: Fix ESSID problem

softmac: Fix ESSID problem

Victor Porton reported that the SoftMAC layer had random problem when setting the ESSID :
http://bugzilla.kernel.org/show_bug.cgi?id=8686 After investigation, it turned out to be
worse, the SoftMAC layer is left in an inconsistent state. The fix is pretty trivial.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Acked-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Acked-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>