fix compiler warning

src/rp2_common/pico_cyw43_driver/cyw43_driver.c

diff --git a/src/rp2_common/pico_cyw43_driver/cyw43_driver.c b/src/rp2_common/pico_cyw43_driver/cyw43_driver.c
index 347ddd5..187e7b0 100644
--- a/src/rp2_common/pico_cyw43_driver/cyw43_driver.c
+++ b/src/rp2_common/pico_cyw43_driver/cyw43_driver.c
@@ -291,7 +291,7 @@
 void __attribute__((weak)) cyw43_cb_process_ethernet(__unused void *cb_data, __unused int itf, __unused size_t len, __unused const uint8_t *buf) {
     no_lwip_fail();
 }
-int __attribute__((weak)) cyw43_tcpip_link_status(cyw43_t *self, int itf) {
+int __attribute__((weak)) cyw43_tcpip_link_status(__unused cyw43_t *self, int __unused itf) {
     no_lwip_fail();
     return 0;
 }