staging: rtl8723au: cfg80211_rtw_connect(): Simplify ssid preparation

Since we just matched sme->{ssid,ssid_len} to
pnetwork->network.Ssid.{ssid,ssid_len} we can simplify the copy and
move it to just before the call to rtw_set_ssid().

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