carl9170: initialize HW aMPDU parameters properly

This patch changes the initial aMPDU density and
factor settings to match those of Otus.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/carl9170/mac.c

@@ -205,8 +205,8 @@ int carl9170_init_mac(struct ar9170 *ar)
 	carl9170_regwrite(AR9170_MAC_REG_BACKOFF_PROTECT, 0x105);
 
 	/* Aggregation MAX number and timeout */
-	carl9170_regwrite(AR9170_MAC_REG_AMPDU_FACTOR, 0xa);
-	carl9170_regwrite(AR9170_MAC_REG_AMPDU_DENSITY, 0x140a00);
+	carl9170_regwrite(AR9170_MAC_REG_AMPDU_FACTOR, 0x8000a);
+	carl9170_regwrite(AR9170_MAC_REG_AMPDU_DENSITY, 0x140a07);
 
 	carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER,
 			  AR9170_MAC_FTF_DEFAULTS);