Merge pull request #7589 from gneverov/issue_7333

Increase number of LWIP timers for MDNS (fixes #7333)

Author: tannewt

ports/raspberrypi/lwip_inc/lwipopts.h

@@ -60,6 +60,7 @@
 #define LWIP_NUM_NETIF_CLIENT_DATA  1
 #define LWIP_NETIF_EXT_STATUS_CALLBACK 1
 #define MDNS_MAX_SECONDARY_HOSTNAMES 1
+#define MEMP_NUM_SYS_TIMEOUT        (8 + 3 * (LWIP_IPV4 + LWIP_IPV6))
 #endif
 
 #ifndef NDEBUG