wireless: Use eth_<foo>_addr instead of memset

Use the built-in function instead of memset.

Miscellanea:

Add #include <linux/etherdevice.h> where appropriate
Use ETH_ALEN instead of 6

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 8330fa3..477f863 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -808,7 +808,7 @@
 
 	/* copy mac and broadcast addresses to linux device */
 	memcpy(dev->dev_addr, &local->sparm.b4.a_mac_addr, ADDRLEN);
-	memset(dev->broadcast, 0xff, ETH_ALEN);
+	eth_broadcast_addr(dev->broadcast);
 
 	dev_dbg(&link->dev, "ray_dev_init ending\n");
 	return 0;