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/hw.c b/drivers/net/wireless/ath9k/hw.c
index 88c8a62..ab15e55 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -2698,7 +2698,7 @@
 	int status = true, setChip = true;
 
 	DPRINTF(ah->ah_sc, ATH_DBG_POWER_MGMT, "%s -> %s (%s)\n",
-		modes[ahp->ah_powerMode], modes[mode],
+		modes[ah->ah_power_mode], modes[mode],
 		setChip ? "set chip " : "");
 
 	switch (mode) {
@@ -2717,7 +2717,7 @@
 			"Unknown power mode %u\n", mode);
 		return false;
 	}
-	ahp->ah_powerMode = mode;
+	ah->ah_power_mode = mode;
 
 	return status;
 }