net: sockets: Update msg_controllen in recvmsg properly

If adding any control data like timestamping or pkt_info fails, the
msg_controllen wasn't properly cleared.
This commit aims to fix this by clearing the msg_controllen only when
adding control data is successful.

Fixes zephyrproject-rtos#77303

Signed-off-by: Axel Le Bourhis <axel.lebourhis@nxp.com>

subsys/net/lib/sockets/sockets.c

@@ -1575,17 +1575,19 @@ static inline ssize_t zsock_recv_dgram(struct net_context *ctx,
 				bool clear_controllen = true;
 
 				if (IS_ENABLED(CONFIG_NET_CONTEXT_TIMESTAMPING)) {
-					clear_controllen = false;
 					if (add_timestamping(ctx, pkt, msg) < 0) {
 						msg->msg_flags |= ZSOCK_MSG_CTRUNC;
+					} else {
+						clear_controllen = false;
 					}
 				}
 
 				if (IS_ENABLED(CONFIG_NET_CONTEXT_RECV_PKTINFO) &&
 				    net_context_is_recv_pktinfo_set(ctx)) {
-					clear_controllen = false;
 					if (add_pktinfo(ctx, pkt, msg) < 0) {
 						msg->msg_flags |= ZSOCK_MSG_CTRUNC;
+					} else {
+						clear_controllen = false;
 					}
 				}