staging: rtl8723bs: use MAX_RF_PATH_NUM as ceiling to rf path index

use MAX_RF_PATH_NUM as ceiling to rf path index.
Only 2 rf paths are used, not 4. Remove also
TX_POWER_BY_RATE_NUM_RF left unused.

Use RF_PATH_A as loop starting point instead of
hardcoded 0, as in other places.

Related comments modified accordingly.
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/88da23cef57131b39a63b2757b91f959553dd65d.1628329348.git.fabioaiuto83@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/hal_com_phycfg.c

@@ -347,7 +347,7 @@ void PHY_InitTxPowerByRate(struct adapter *padapter)
 	struct hal_com_data	*pHalData = GET_HAL_DATA(padapter);
 	u8 rfPath, rate;
 
-	for (rfPath = 0; rfPath < TX_PWR_BY_RATE_NUM_RF; ++rfPath)
+	for (rfPath = RF_PATH_A; rfPath < MAX_RF_PATH_NUM; ++rfPath)
 		for (rate = 0; rate < TX_PWR_BY_RATE_NUM_RATE; ++rate)
 			pHalData->TxPwrByRateOffset[rfPath][rate] = 0;
 }

drivers/staging/rtl8723bs/include/hal_data.h

@@ -234,14 +234,12 @@ struct hal_com_data {
 	u8 TxPwrInPercentage;
 
 	u8 TxPwrCalibrateRate;
-	/*  TX power by rate table at most 4RF path. */
-	/*  The register is */
-	/*  VHT TX power by rate off setArray = */
-	/*  RF: at most 4*4 = ABCD = 0/1/2/3 */
-	/*  CCK = 0 OFDM = 1/2 HT-MCS 0-15 =3/4/56 VHT =7/8/9/10/11 */
+	/*  TX power by rate table */
+	/*  RF: at most 2 = AB = 0/1 */
+	/*  CCK = 0 OFDM = 1 HT-MCS 0-7 = 2 */
 	u8 TxPwrByRateTable;
 	u8 TxPwrByRateBand;
-	s8 TxPwrByRateOffset[TX_PWR_BY_RATE_NUM_RF][TX_PWR_BY_RATE_NUM_RATE];
+	s8 TxPwrByRateOffset[MAX_RF_PATH_NUM][TX_PWR_BY_RATE_NUM_RATE];
 	/*  */
 
 	/* 2 Power Limit Table */
@@ -259,7 +257,7 @@ struct hal_com_data {
 						[MAX_RF_PATH_NUM];
 
 	/*  Store the original power by rate value of the base of each rate section of rf path A & B */
-	u8 TxPwrByRateBase2_4G[TX_PWR_BY_RATE_NUM_RF][MAX_BASE_NUM_IN_PHY_REG_PG_2_4G];
+	u8 TxPwrByRateBase2_4G[MAX_RF_PATH_NUM][MAX_BASE_NUM_IN_PHY_REG_PG_2_4G];
 
 	/*  For power group */
 	u8 PwrGroupHT20[RF_PATH_MAX_92C_88E][CHANNEL_MAX_NUMBER];

drivers/staging/rtl8723bs/include/hal_pg.h

@@ -14,11 +14,9 @@
  */
 #define MAX_TX_COUNT				4
 
-/*  For VHT series TX power by rate table. */
-/*  VHT TX power by rate off setArray = */
-/*  RF: at most 4*4 = ABCD = 0/1/2/3 */
-/*  CCK = 0 OFDM = 1/2 HT-MCS 0-15 =3/4/56 VHT =7/8/9/10/11 */
-#define TX_PWR_BY_RATE_NUM_RF			4
+/*  TX power by rate table. */
+/*  RF: = AB = 0/1 */
+/*  CCK = 0 OFDM = 1 HT-MCS 0-7 = 2 */
 #define TX_PWR_BY_RATE_NUM_RATE			84
 #define MAX_RF_PATH_NUM				2
 #define	MAX_CHNL_GROUP_24G			6