ath9k: Advertise midband for AR5416 devices

This has to be done if the EEPROM supports FCC Midband
capability.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/eeprom.h

@@ -639,6 +639,7 @@ struct ar9287_eeprom {
 } __packed;
 
 enum reg_ext_bitmap {
+	REG_EXT_FCC_MIDBAND = 0,
 	REG_EXT_JAPAN_MIDBAND = 1,
 	REG_EXT_FCC_DFS_HT40 = 2,
 	REG_EXT_JAPAN_NONDFS_HT40 = 3,

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

@@ -3660,7 +3660,10 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
 			AR_EEPROM_EEREGCAP_EN_KK_U1_EVEN;
 	}
 
-	pCap->reg_cap |= AR_EEPROM_EEREGCAP_EN_FCC_MIDBAND;
+	/* Advertise midband for AR5416 with FCC midband set in eeprom */
+	if (regulatory->current_rd_ext & (1 << REG_EXT_FCC_MIDBAND) &&
+	    AR_SREV_5416(ah))
+		pCap->reg_cap |= AR_EEPROM_EEREGCAP_EN_FCC_MIDBAND;
 
 	pCap->num_antcfg_5ghz =
 		ah->eep_ops->get_num_ant_config(ah, ATH9K_HAL_FREQ_BAND_5GHZ);