ath9k: Fix bug in 4K EEPROM size calculation

We should be checking with the 4K header and not the non-4K
header size.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/eeprom.c b/drivers/net/wireless/ath9k/eeprom.c
index 973b576..d7b9cf4 100644
--- a/drivers/net/wireless/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath9k/eeprom.c
@@ -416,7 +416,7 @@
 	else
 		el = ah->eeprom.map4k.baseEepHeader.length;
 
-	if (el > sizeof(struct ar5416_eeprom_def))
+	if (el > sizeof(struct ar5416_eeprom_4k))
 		el = sizeof(struct ar5416_eeprom_4k) / sizeof(u16);
 	else
 		el = el / sizeof(u16);