staging: rtl8723au: Do not call netdev_open23a() from cfg80211_rtw_change_iface()

Calling open on the device when changing the interface type is wrong.
Let the stack call open at the right time.

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