ath9k_hw: Fix eeprom offset for AR9287 devices (PCI/USB)

AR9287 devices (PCI/USB) use different eeprom start location
to read nvram. New devices might endup with same devid. So use
driver_info to set offset, instead of devid. driver_info is
valid for HTC devices alone which is filled in usb_device_id.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_9287.c b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
index e756978..bcb9ed3 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_9287.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
@@ -37,10 +37,10 @@
 	int addr, eep_start_loc;
 	eep_data = (u16 *)eep;
 
-	if (AR9287_HTC_DEVID(ah))
-		eep_start_loc = AR9287_HTC_EEP_START_LOC;
-	else
+	if (!common->driver_info)
 		eep_start_loc = AR9287_EEP_START_LOC;
+	else
+		eep_start_loc = AR9287_HTC_EEP_START_LOC;
 
 	if (!ath9k_hw_use_flash(ah)) {
 		ath_print(common, ATH_DBG_EEPROM,