net: usb: Use eth_<foo>_addr instead of memset

Use the built-in function instead of memset.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index 602dc66..f603f36 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -108,7 +108,7 @@
 	skb_push(skb, ETH_HLEN);
 	skb_reset_mac_header(skb);
 	eth_hdr(skb)->h_proto = proto;
-	memset(eth_hdr(skb)->h_source, 0, ETH_ALEN);
+	eth_zero_addr(eth_hdr(skb)->h_source);
 fix_dest:
 	memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
 	return 1;