8139cp/8139too: do not read into reserved registers

delay_eeprom() use long read for Cfg9346 register(offset 0x50) which may read
into the area of reserved register(offset 0x53). Use byte read instead.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/8139cp.c

@@ -1589,7 +1589,7 @@ static int cp_set_mac_address(struct net_device *dev, void *p)
    No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
  */
 
-#define eeprom_delay()	readl(ee_addr)
+#define eeprom_delay()	readb(ee_addr)
 
 /* The EEPROM commands include the alway-set leading bit. */
 #define EE_EXTEND_CMD	(4)

drivers/net/ethernet/realtek/8139too.c

@@ -1122,7 +1122,7 @@ static void __devexit rtl8139_remove_one (struct pci_dev *pdev)
    No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
  */
 
-#define eeprom_delay()	(void)RTL_R32(Cfg9346)
+#define eeprom_delay()	(void)RTL_R8(Cfg9346)
 
 /* The EEPROM commands include the alway-set leading bit. */
 #define EE_WRITE_CMD	(5)