ath9k: Initialize channel change time

Set channel change time to 5ms, this will improve scan results.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index cd9bab5..7264c4c 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1603,6 +1603,7 @@
 
 	hw->queues = 4;
 	hw->max_rates = 4;
+	hw->channel_change_time = 5000;
 	hw->max_rate_tries = ATH_11N_TXMAXTRY;
 	hw->sta_data_size = sizeof(struct ath_node);
 	hw->vif_data_size = sizeof(struct ath_vif);