Resolved the build failure for m5-stack ipv6 only test

Author: shripad621git

examples/platform/esp32/Rpc.cpp

@@ -197,13 +197,15 @@ class Esp32WiFi final : public WiFi
         return pw::OkStatus();
     }
 
+#if CHIP_DEVICE_CONFIG_ENABLE_IPV4
     pw::Status GetIP4Address(const pw_protobuf_Empty & request, chip_rpc_IP4Address & response) override
     {
         esp_netif_ip_info_t ip_info;
         PW_TRY(EspToPwStatus(esp_netif_get_ip_info(esp_netif_get_handle_from_ifkey("WIFI_STA_DEF"), &ip_info)));
         snprintf(response.address, sizeof(response.address), IPSTR, IP2STR(&ip_info.ip));
         return pw::OkStatus();
     }
+#endif
 
     pw::Status GetIP6Address(const pw_protobuf_Empty & request, chip_rpc_IP6Address & response) override
     {

scripts/build/builders/esp32.py

@@ -197,6 +197,8 @@ def generate(self):
         if not self.enable_ipv4:
             self._Execute(
                 ['bash', '-c', 'echo -e "\\nCONFIG_DISABLE_IPV4=y\\n" >>%s' % shlex.quote(defaults_out)])
+            self._Execute(
+                ['bash', '-c', 'echo -e "\\nCONFIG_LWIP_IPV4=n\\n" >>%s' % shlex.quote(defaults_out)])
 
         if self.enable_insights_trace:
             insights_flag = 'y'