ath9k_hw: fix the last register write for ar5416 addac

The previous register used in these initvals was probably accidentally
copied over from the AR9100 values.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar5008_initvals.h

@@ -669,6 +669,6 @@ static const u32 ar5416Addac[][2] = {
 	{0x0000989c, 0x00000000},
 	{0x0000989c, 0x00000000},
 	{0x0000989c, 0x00000000},
-	{0x000098cc, 0x00000000},
+	{0x000098c4, 0x00000000},
 };