iwlagn: convert remain-on-channel duration to TU

The device expects TU but we get ms, so convert.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-mac80211.c b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
index 073e827c..05b1f0d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-mac80211.c
+++ b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
@@ -957,7 +957,8 @@
 
 	priv->hw_roc_channel = channel;
 	priv->hw_roc_chantype = channel_type;
-	priv->hw_roc_duration = duration;
+	/* convert from ms to TU */
+	priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
 	priv->hw_roc_start_notified = false;
 	cancel_delayed_work(&priv->hw_roc_disable_work);