Revert "vdpa/mlx5: Use eth_broadcast_addr() to assign broadcast address"

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2169174

Upstream Status: RHEL only

SVQ can not work with vlan filtering and support VLAN in SVQ is not a
high priority now, so need to revert these commit in rhel9.2

This reverts commit bc477bc.

Signed-off-by: Cindy Lu <lulu@redhat.com>

Author: lulu-github-name

drivers/vdpa/mlx5/net/mlx5_vnet.c

@@ -1466,7 +1466,7 @@ static int mlx5_vdpa_add_mac_vlan_rules(struct mlx5_vdpa_net *ndev, u8 *mac,
 	headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, outer_headers);
 	dmac_c = MLX5_ADDR_OF(fte_match_param, headers_c, outer_headers.dmac_47_16);
 	dmac_v = MLX5_ADDR_OF(fte_match_param, headers_v, outer_headers.dmac_47_16);
-	eth_broadcast_addr(dmac_c);
+	memset(dmac_c, 0xff, ETH_ALEN);
 	ether_addr_copy(dmac_v, mac);
 	MLX5_SET(fte_match_set_lyr_2_4, headers_c, cvlan_tag, 1);
 	if (tagged) {