Clear the IFF_OACTIVE flag at the end of ieinit(). This prevents

the adapter from becoming wedged when when the interface is
is brought up by ether_ioctl() (when you set an IP address for example.)

Confirmed this "fix" from NetBSD's i82586 backend.  It seems hackish
to me but whatever.

sys/dev/ie/if_ie.c

@@ -2080,6 +2080,8 @@ ieinit(xsc)
 	}
 	sc->arpcom.ac_if.if_flags |= IFF_RUNNING;	/* tell higher levels
 							 * we're here */
+	sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
+
 	start_receiver(sc);
 
 	return;