lwip: Update LWIP_DHCP_OPTIONS_LEN default value when LWIP_DHCP_DISABLE_VENDOR_CLASS_ID disabled

Closes https://github.com/espressif/esp-idf/issues/7742

components/lwip/Kconfig

@@ -275,7 +275,8 @@ menu "LWIP"
 
     config LWIP_DHCP_OPTIONS_LEN
         int "DHCP total option length"
-        default 68
+        default 68 if LWIP_DHCP_DISABLE_VENDOR_CLASS_ID
+        default 108 if !LWIP_DHCP_DISABLE_VENDOR_CLASS_ID
         range 68 255
         help
             Set total length of outgoing DHCP option msg. Generally bigger value means it can carry more