mwifiex: add support for WPS2.0

This patches enables setting association request and probe request
IE for station interface. WPS exchange between WPS2.0 AP and mwifiex
STA Enrollee/External Registrar completes successfully.

Tested with wpa_supplicant 1.0 and 2.0 devel.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c
index 54bb483..0d55c5b 100644
--- a/drivers/net/wireless/mwifiex/init.c
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -131,6 +131,8 @@
 	priv->wmm_qosinfo = 0;
 	priv->curr_bcn_buf = NULL;
 	priv->curr_bcn_size = 0;
+	priv->wps_ie = NULL;
+	priv->wps_ie_len = 0;
 
 	priv->scan_block = false;