ath9k_hw: clean up hardware revision checks

- AR_SREV_5416_20_OR_LATER is always true, remove it
- AR_SREV_9280_20_OR_LATER is always true within eeprom_4k.c and eeprom_9287.c
- (AR_SREV_9271 || AR_SREV_9285) is always true in eeprom_4k.c

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_def.c b/drivers/net/wireless/ath/ath9k/eeprom_def.c
index e7e84be..eda681f 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_def.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c
@@ -547,8 +547,7 @@
 				break;
 		}
 
-		if (AR_SREV_5416_20_OR_LATER(ah) &&
-		    (ah->rxchainmask == 5 || ah->txchainmask == 5) && (i != 0))
+		if ((ah->rxchainmask == 5 || ah->txchainmask == 5) && (i != 0))
 			regChainOffset = (i == 1) ? 0x2000 : 0x1000;
 		else
 			regChainOffset = i * 0x1000;
@@ -565,9 +564,8 @@
 			  SM(pModal->iqCalQCh[i],
 			     AR_PHY_TIMING_CTRL4_IQCORR_Q_Q_COFF));
 
-		if ((i == 0) || AR_SREV_5416_20_OR_LATER(ah))
-			ath9k_hw_def_set_gain(ah, pModal, eep, txRxAttenLocal,
-					      regChainOffset, i);
+		ath9k_hw_def_set_gain(ah, pModal, eep, txRxAttenLocal,
+				      regChainOffset, i);
 	}
 
 	if (AR_SREV_9280_20_OR_LATER(ah)) {
@@ -893,8 +891,7 @@
 		      xpdGainValues[2]);
 
 	for (i = 0; i < AR5416_MAX_CHAINS; i++) {
-		if (AR_SREV_5416_20_OR_LATER(ah) &&
-		    (ah->rxchainmask == 5 || ah->txchainmask == 5) &&
+		if ((ah->rxchainmask == 5 || ah->txchainmask == 5) &&
 		    (i != 0)) {
 			regChainOffset = (i == 1) ? 0x2000 : 0x1000;
 		} else
@@ -935,27 +932,24 @@
 
 			ENABLE_REGWRITE_BUFFER(ah);
 
-			if ((i == 0) || AR_SREV_5416_20_OR_LATER(ah)) {
-				if (OLC_FOR_AR9280_20_LATER) {
-					REG_WRITE(ah,
-						AR_PHY_TPCRG5 + regChainOffset,
-						SM(0x6,
-						AR_PHY_TPCRG5_PD_GAIN_OVERLAP) |
-						SM_PD_GAIN(1) | SM_PD_GAIN(2) |
-						SM_PD_GAIN(3) | SM_PD_GAIN(4));
-				} else {
-					REG_WRITE(ah,
-						AR_PHY_TPCRG5 + regChainOffset,
-						SM(pdGainOverlap_t2,
-						AR_PHY_TPCRG5_PD_GAIN_OVERLAP)|
-						SM_PDGAIN_B(0, 1) |
-						SM_PDGAIN_B(1, 2) |
-						SM_PDGAIN_B(2, 3) |
-						SM_PDGAIN_B(3, 4));
-				}
+			if (OLC_FOR_AR9280_20_LATER) {
+				REG_WRITE(ah,
+					AR_PHY_TPCRG5 + regChainOffset,
+					SM(0x6,
+					AR_PHY_TPCRG5_PD_GAIN_OVERLAP) |
+					SM_PD_GAIN(1) | SM_PD_GAIN(2) |
+					SM_PD_GAIN(3) | SM_PD_GAIN(4));
+			} else {
+				REG_WRITE(ah,
+					AR_PHY_TPCRG5 + regChainOffset,
+					SM(pdGainOverlap_t2,
+					AR_PHY_TPCRG5_PD_GAIN_OVERLAP)|
+					SM_PDGAIN_B(0, 1) |
+					SM_PDGAIN_B(1, 2) |
+					SM_PDGAIN_B(2, 3) |
+					SM_PDGAIN_B(3, 4));
 			}
 
-
 			ath9k_adjust_pdadc_values(ah, pwr_table_offset,
 						  diff, pdadcValues);