ath: remove ath_regulatory::current_rd_ext

It is unused since the previous dead code that was using it had been
removed earlier.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath.h

@@ -72,7 +72,6 @@ struct ath_regulatory {
 	u16 country_code;
 	u16 max_power_level;
 	u16 current_rd;
-	u16 current_rd_ext;
 	int16_t power_limit;
 	struct reg_dmn_pair_mapping *regpair;
 };

drivers/net/wireless/ath/ath9k/hw.c

@@ -2072,11 +2072,6 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
 	eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_0);
 	regulatory->current_rd = eeval;
 
-	eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_1);
-	if (AR_SREV_9285_12_OR_LATER(ah))
-		eeval |= AR9285_RDEXT_DEFAULT;
-	regulatory->current_rd_ext = eeval;
-
 	if (ah->opmode != NL80211_IFTYPE_AP &&
 	    ah->hw_version.subvendorid == AR_SUBVENDOR_ID_NEW_A) {
 		if (regulatory->current_rd == 0x64 ||

drivers/net/wireless/ath/carl9170/main.c

@@ -1896,7 +1896,6 @@ static int carl9170_parse_eeprom(struct ar9170 *ar)
 		ar->hw->channel_change_time = 80 * 1000;
 
 	regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
-	regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
 
 	/* second part of wiphy init */
 	SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);