staging: vt6655: Use ether_addr_copy function

This patch fixes the following checkpatch.pl warnings:
WARNING: "Prefer ether_addr_copy() over memcpy() if the Ethernet
addresses are __aligned(2)" in file iwctl.c
Pahole shows that the addresses are aligned
Signed-off-by: Dilek Uzulmez <dilekuzulmez@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/iwctl.c

@@ -1756,7 +1756,7 @@ int iwctl_siwencodeext(struct net_device *dev,
 	}
 
 /**************Translate iw_encode_ext to viawget_wpa_param****************/
-	memcpy(param->addr, addr, ETH_ALEN);
+	ether_addr_copy(param->addr, addr);
 	param->u.wpa_key.alg_name = (int)alg_name;
 	param->u.wpa_key.set_tx = set_tx;
 	param->u.wpa_key.key_index = key_idx;