ath9k: Enable dynamic power save in ath9k.

This patch implements dynamic power save feature for ath9k.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index 3817645..0b305b8 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -793,6 +793,8 @@
 	u16 ah_currentRD5G;
 	u16 ah_currentRD2G;
 	char ah_iso[4];
+	enum ath9k_power_mode ah_power_mode;
+	enum ath9k_power_mode ah_restore_mode;
 
 	struct ath9k_channel ah_channels[150];
 	struct ath9k_channel *ah_curchan;