staging: rtl8723au: is_same_network23a(): Use the capability info from wlan_bssid_ex

We already have the capability info in struct wlan_bssid_ex, no point
in searching for it once again.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>