wifi: rtw89: 8852c: rfk: correct DPK settings

Some DPK settings are wrong, and causes bad TX performance occasionally.
So, fix them by internal suggestions.

Fixes: da4cea16 ("rtw89: 8852c: rfk: add DPK")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221209020940.9573-3-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/reg.h

@@ -3671,6 +3671,8 @@
 #define RR_TXRSV_GAPK BIT(19)
 #define RR_BIAS 0x5e
 #define RR_BIAS_GAPK BIT(19)
+#define RR_TXAC 0x5f
+#define RR_TXAC_IQG GENMASK(3, 0)
 #define RR_BIASA 0x60
 #define RR_BIASA_TXG GENMASK(15, 12)
 #define RR_BIASA_TXA GENMASK(19, 16)

drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c

@@ -1872,12 +1872,11 @@ static void _dpk_rf_setting(struct rtw89_dev *rtwdev, u8 gain,
 			       0x50101 | BIT(rtwdev->dbcc_en));
 		rtw89_write_rf(rtwdev, path, RR_MOD_V1, RR_MOD_MASK, RF_DPK);
 
-		if (dpk->bp[path][kidx].band == RTW89_BAND_6G && dpk->bp[path][kidx].ch >= 161) {
+		if (dpk->bp[path][kidx].band == RTW89_BAND_6G && dpk->bp[path][kidx].ch >= 161)
 			rtw89_write_rf(rtwdev, path, RR_IQGEN, RR_IQGEN_BIAS, 0x8);
+
 		rtw89_write_rf(rtwdev, path, RR_LOGEN, RR_LOGEN_RPT, 0xd);
-		} else {
-			rtw89_write_rf(rtwdev, path, RR_LOGEN, RR_LOGEN_RPT, 0xd);
-		}
+		rtw89_write_rf(rtwdev, path, RR_TXAC, RR_TXAC_IQG, 0x8);
 
 		rtw89_write_rf(rtwdev, path, RR_RXA2, RR_RXA2_ATT, 0x0);
 		rtw89_write_rf(rtwdev, path, RR_TXIQK, RR_TXIQK_ATT2, 0x3);