eth-raw-os.c: Add cast to bind(2) call

With more recent gcc versions we otherwise get an error like:
note: expected 'const struct sockaddr *' but argument is of type
'struct sockaddr_in *'

and the common solution here is to cast, rather than re-work the code.

Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NJoe Hershberger <joe.hershberger@ni.com>

arch/sandbox/cpu/eth-raw-os.c

@@ -198,7 +198,8 @@ int sandbox_eth_raw_os_send(void *packet, int length,
 		addr.sin_family = AF_INET;
 		addr.sin_port = udph->source;
 		addr.sin_addr.s_addr = iph->saddr;
-		retval = bind(priv->local_bind_sd, &addr, sizeof(addr));
+		retval = bind(priv->local_bind_sd, (struct sockaddr *)&addr,
+			      sizeof(addr));
 		if (retval < 0)
 			printf("Failed to bind: %d %s\n", errno,
 			       strerror(errno));