ath6kl: move setting netdev for non-cf80211 case

The check for SET_NETDEV_DEV is not required given that
this is upstream. The setting of the SET_NETDEV_DEV with
the osDevInfo.pOSDevice is redundant for the cfg80211 case
as this was already being done, so just set the netdev device
for the non-cfg80211 which was missing.

Cc: Naveen Singh <nsingh@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>