[PATCH] bcm43xx: improved statistics

This minor patch for wireless-2.6 (softmac) adjusts the parameters of
the wireless statistics to improve the display of programs such as the
"Wireless Network Information" applet of KDE. Thanks to Dan Williams
and Jean Tourrilhes for valuable help in setting up the return of
info in dBm.

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