staging: wilc1000: fix memdup.cocci warnings

drivers/staging/wilc1000/host_interface.c:946:32-39: WARNING opportunity for kmemdup
drivers/staging/wilc1000/host_interface.c:970:30-37: WARNING opportunity for kmemdup

 Use kmemdup rather than duplicating its implementation

Generated by: scripts/coccinelle/api/memdup.cocci

Fixes: aaea2164bdff ("staging: wilc1000: check for kmalloc allocation failures")
CC: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -936,12 +936,12 @@ static s32 handle_connect(struct wilc_vif *vif,
 	}
 
 	if (conn_attr->bssid) {
-		hif_drv->usr_conn_req.bssid = kmalloc(6, GFP_KERNEL);
+		hif_drv->usr_conn_req.bssid = kmemdup(conn_attr->bssid, 6,
+						      GFP_KERNEL);
 		if (!hif_drv->usr_conn_req.bssid) {
 			result = -ENOMEM;
 			goto error;
 		}
-		memcpy(hif_drv->usr_conn_req.bssid, conn_attr->bssid, 6);
 	}
 
 	hif_drv->usr_conn_req.ssid_len = conn_attr->ssid_len;
@@ -960,15 +960,13 @@ static s32 handle_connect(struct wilc_vif *vif,
 
 	hif_drv->usr_conn_req.ies_len = conn_attr->ies_len;
 	if (conn_attr->ies) {
-		hif_drv->usr_conn_req.ies = kmalloc(conn_attr->ies_len,
+		hif_drv->usr_conn_req.ies = kmemdup(conn_attr->ies,
+						    conn_attr->ies_len,
 						    GFP_KERNEL);
 		if (!hif_drv->usr_conn_req.ies) {
 			result = -ENOMEM;
 			goto error;
 		}
-		memcpy(hif_drv->usr_conn_req.ies,
-		       conn_attr->ies,
-		       conn_attr->ies_len);
 	}
 
 	hif_drv->usr_conn_req.security = conn_attr->security;