rtw88: fix incorrect tx power limit at 5G

Tx power limit is stored separately by 2G and 5G.
But driver did not get tx power limit from 5G and causes incorrect tx
power. Check if the channel is beyond 2G and get the corresponding tx
power limit.
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/phy.c

@@ -1466,15 +1466,6 @@ static u8 rtw_phy_get_5g_tx_power_index(struct rtw_dev *rtwdev,
 	return tx_power;
 }
 
-static s8 __rtw_phy_get_tx_power_limit(struct rtw_hal *hal,
-				       u8 bw, u8 rs, u8 ch, u8 regd)
-{
-	if (regd > RTW_REGD_WW)
-		return RTW_MAX_POWER_INDEX;
-
-	return hal->tx_pwr_limit_2g[regd][bw][rs][ch];
-}
-
 static s8 rtw_phy_get_tx_power_limit(struct rtw_dev *rtwdev, u8 band,
 				     enum rtw_bandwidth bw, u8 rf_path,
 				     u8 rate, u8 channel, u8 regd)
@@ -1484,6 +1475,9 @@ static s8 rtw_phy_get_tx_power_limit(struct rtw_dev *rtwdev, u8 band,
 	u8 rs;
 	int ch_idx;
 
+	if (regd > RTW_REGD_WW)
+		return RTW_MAX_POWER_INDEX;
+
 	if (rate >= DESC_RATE1M && rate <= DESC_RATE11M)
 		rs = RTW_RATE_SECTION_CCK;
 	else if (rate >= DESC_RATE6M && rate <= DESC_RATE54M)
@@ -1503,7 +1497,10 @@ static s8 rtw_phy_get_tx_power_limit(struct rtw_dev *rtwdev, u8 band,
 	if (ch_idx < 0)
 		goto err;
 
-	power_limit = __rtw_phy_get_tx_power_limit(hal, bw, rs, ch_idx, regd);
+	if (channel <= RTW_MAX_CHANNEL_NUM_2G)
+		power_limit = hal->tx_pwr_limit_2g[regd][bw][rs][ch_idx];
+	else
+		power_limit = hal->tx_pwr_limit_5g[regd][bw][rs][ch_idx];
 
 	return power_limit;