net:drivers/net: Miscellaneous conversions to ETH_ALEN

Convert the memset/memcpy uses of 6 to ETH_ALEN
where appropriate.

Also convert some struct definitions and u8 array
declarations of [6] to ETH_ALEN.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c
index e62df2b..a235bd9fd 100644
--- a/drivers/net/ethernet/sun/sungem.c
+++ b/drivers/net/ethernet/sun/sungem.c
@@ -2779,7 +2779,7 @@
 		return -1;
 #endif
 	}
-	memcpy(dev->dev_addr, addr, 6);
+	memcpy(dev->dev_addr, addr, ETH_ALEN);
 #else
 	get_gem_mac_nonobp(gp->pdev, gp->dev->dev_addr);
 #endif