ar9170: update hardware definitions

This patch only contains a few uncritical updates for the
hardware definition header.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ar9170/mac.c b/drivers/net/wireless/ath/ar9170/mac.c
index 72c7b5d..706262f 100644
--- a/drivers/net/wireless/ath/ar9170/mac.c
+++ b/drivers/net/wireless/ath/ar9170/mac.c
@@ -84,7 +84,7 @@
 	val = 0x140a00 | (mpdudensity ? (mpdudensity + 1) : 0);
 
 	ar9170_regwrite_begin(ar);
-	ar9170_regwrite(AR9170_MAC_REG_AMPDU_SET, val);
+	ar9170_regwrite(AR9170_MAC_REG_AMPDU_DENSITY, val);
 	ar9170_regwrite_finish();
 
 	return ar9170_regwrite_result();