[PATCH] bcm43xx: output proper link quality with scans

The bcm43xx-softmac driver fails to set two quantities needed for
iwlist to compute wireless quality when scanning. As a result, userland
programs using the quality to determine the best connection fail.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>