cfg80211: let SME control reassociation vs. association

Since we don't really know that well in the kernel,
let's let the SME control whether it wants to use
reassociation or not, by allowing it to give the
previous BSSID in the associate() parameters.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index ca986cc..71847d3 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -664,10 +664,11 @@
  * @ie_len: Length of ie buffer in octets
  * @use_mfp: Use management frame protection (IEEE 802.11w) in this association
  * @crypto: crypto settings
+ * @prev_bssid: previous BSSID, if not %NULL use reassociate frame
  */
 struct cfg80211_assoc_request {
 	struct cfg80211_bss *bss;
-	const u8 *ie;
+	const u8 *ie, *prev_bssid;
 	size_t ie_len;
 	struct cfg80211_crypto_settings crypto;
 	bool use_mfp;