Drop incoming network packets as long as we are not in RUN state. This

Drop incoming network packets as long as we are not in RUN state.  This
happens when we successfully associate and the AP tries to initiate the
WPA2 handshake but we haven't received the asynchronous ASSOC event yet.
Dropping the packet will make the AP retry, and at that point we should
have successfully associated.  While there, don't feed the event packets
to our network stack.  It's been helpful for debugging but now it's time
to let go.