Fix wpa_supplicant build with CONFIG_L2_PACKET=pcap

Commit e6dd8196e5daf39e4204ef8ecd26dd50fdca6040 ('Work around Linux
packet socket regression') forgot to add the l2_packet_init_bridge()
wrapper for l2_packet_pcap.c while updating all the other l2_packet
options. This resulted in wpa_supplicant build failing due to missing
l2_packet_init_bridge() function when using CONFIG_L2_PACKET=pcap in
wpa_supplicant/.config. Fix this by adding the wrapper function.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/l2_packet/l2_packet_pcap.c

@@ -312,6 +312,18 @@ struct l2_packet_data * l2_packet_init(
 }
 
 
+struct l2_packet_data * l2_packet_init_bridge(
+	const char *br_ifname, const char *ifname, const u8 *own_addr,
+	unsigned short protocol,
+	void (*rx_callback)(void *ctx, const u8 *src_addr,
+			    const u8 *buf, size_t len),
+	void *rx_callback_ctx, int l2_hdr)
+{
+	return l2_packet_init(br_ifname, own_addr, protocol, rx_callback,
+			      rx_callback_ctx, l2_hdr);
+}
+
+
 void l2_packet_deinit(struct l2_packet_data *l2)
 {
 	if (l2 == NULL)