ethernet: Convert ETHER_ADDR_LEN uses to ETH_ALEN

Reduce the number of #defines, use the normal #define from if_ether.h

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/8390/hp-plus.c b/drivers/net/ethernet/8390/hp-plus.c
index eeac843..d42938b 100644
--- a/drivers/net/ethernet/8390/hp-plus.c
+++ b/drivers/net/ethernet/8390/hp-plus.c
@@ -202,7 +202,7 @@
 	/* Retrieve and checksum the station address. */
 	outw(MAC_Page, ioaddr + HP_PAGING);
 
-	for(i = 0; i < ETHER_ADDR_LEN; i++) {
+	for(i = 0; i < ETH_ALEN; i++) {
 		unsigned char inval = inb(ioaddr + 8 + i);
 		dev->dev_addr[i] = inval;
 		checksum += inval;