ath9k_htc: fix eeprom access

wireless-testing commit a05b5d45
ath9k: add support for reading eeprom from platform data on PCI devices

This change moved the initialization of the AH_USE_EEPROM flag from ath9k_hw
to ath9k. This needs to be added to ath9k_htc as well
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -639,6 +639,7 @@ static int ath9k_init_priv(struct ath9k_htc_priv *priv,
 
 	ah->hw_version.devid = devid;
 	ah->hw_version.subsysid = 0; /* FIXME */
+	ah->ah_flags |= AH_USE_EEPROM;
 	priv->ah = ah;
 
 	common = ath9k_hw_common(ah);