staging: wlan-ng: coding style problem fix

WARNING: break is not useful after a goto or return
201: FILE: drivers/staging/wlan-ng/p80211conv.c:201:
+               return 1;
+               break;

Signed-off-by: Modestas Stankus <stankus.modestas@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>