wifi: rtw89: phy: set TX power according to RF path number by chip

Previously, all supported chips had two RF paths. Therefore, these
codes used static number for TX power setting. Now, we are planning
to support a new chip which has only one RF path. So, we refine the
setting codes to refer to chip's RF path number at runtime.

Signed-off-by: Zong-Zhe Yang <[e-mail]>
Signed-off-by: Ping-Ke Shih <[e-mail]>
Signed-off-by: Kalle Valo <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

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

···
 				const struct rtw89_chan *chan,
 				enum rtw89_phy_idx phy_idx)
 {
+	u8 max_nss_num = rtwdev->chip->rf_path_num;
 	static const u8 rs[] = {
 		RTW89_RS_CCK,
 		RTW89_RS_OFDM,
···
 	BUILD_BUG_ON(rtw89_rs_idx_max[RTW89_RS_HEDCM] % 4);
 
 	addr = R_AX_PWR_BY_RATE;
-	for (cur.nss = 0; cur.nss <= RTW89_NSS_2; cur.nss++) {
+	for (cur.nss = 0; cur.nss < max_nss_num; cur.nss++) {
 		for (i = 0; i < ARRAY_SIZE(rs); i++) {
 			if (cur.nss >= rtw89_rs_nss_max[rs[i]])
 				continue;
···
 			       const struct rtw89_chan *chan,
 			       enum rtw89_phy_idx phy_idx)
 {
+	u8 max_ntx_num = rtwdev->chip->rf_path_num;
 	struct rtw89_txpwr_limit lmt;
 	u8 ch = chan->channel;
 	u8 bw = chan->band_width;
···
 		     RTW89_TXPWR_LMT_PAGE_SIZE);
 
 	addr = R_AX_PWR_LMT;
-	for (i = 0; i < RTW89_NTX_NUM; i++) {
+	for (i = 0; i < max_ntx_num; i++) {
 		rtw89_phy_fill_txpwr_limit(rtwdev, chan, &lmt, i);
 
 		ptr = (s8 *)&lmt;
···
 				  const struct rtw89_chan *chan,
 				  enum rtw89_phy_idx phy_idx)
 {
+	u8 max_ntx_num = rtwdev->chip->rf_path_num;
 	struct rtw89_txpwr_limit_ru lmt_ru;
 	u8 ch = chan->channel;
 	u8 bw = chan->band_width;
···
 		     RTW89_TXPWR_LMT_RU_PAGE_SIZE);
 
 	addr = R_AX_PWR_RU_LMT;
-	for (i = 0; i < RTW89_NTX_NUM; i++) {
+	for (i = 0; i < max_ntx_num; i++) {
 		rtw89_phy_fill_txpwr_limit_ru(rtwdev, chan, &lmt_ru, i);
 
 		ptr = (s8 *)&lmt_ru;