Enable NCM + iperf for MCU with bigger RAM.

examples/device/net_lwip_webserver/src/main.c

@@ -53,6 +53,10 @@ try changing the first byte of tud_network_mac_address[] below from 0x02 to 0x00
 #include "lwip/init.h"
 #include "lwip/timeouts.h"
 
+#ifdef INCLUDE_IPERF
+  #include "lwip/apps/lwiperf.h"
+#endif
+
 #define INIT_IP4(a, b, c, d) \
   { PP_HTONL(LWIP_MAKEU32(a, b, c, d)) }
 
@@ -225,6 +229,10 @@ int main(void) {
   while (dnserv_init(IP_ADDR_ANY, 53, dns_query_proc) != ERR_OK);
   httpd_init();
 
+#ifdef INCLUDE_IPERF
+  // test with: iperf -c 192.168.7.1 -e -i 1 -M 5000 -l 8192 -r
+  lwiperf_start_tcp_server_default(NULL, NULL);
+#endif
 
   while (1) {
     tud_task();