Add some missing Xrefs to drivers.

MFC after:	3 days

usr.sbin/wpa/wpa_supplicant/wpa_supplicant.8

@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd June 16, 2005
+.Dd February 21, 2008
 .Dt WPA_SUPPLICANT 8
 .Os
 .Sh NAME
@@ -119,13 +119,17 @@ Include key information in debugging output.
 Display the license for this program on the terminal and exit.
 .El
 .Sh SEE ALSO
+.Xr an 4 ,
 .Xr ath 4 ,
 .Xr ipw 4 ,
 .Xr iwi 4 ,
 .Xr ral 4 ,
+.Xr rum 4 ,
 .Xr ural 4 ,
 .Xr wi 4 ,
 .Xr wlan 4 ,
+.Xr wpi 4 ,
+.Xr zyd 4 ,
 .Xr wpa_supplicant.conf 5 ,
 .Xr devd 8 ,
 .Xr ifconfig 8 ,