Clean up .available & .poll

src/network/net_pcap.c

@@ -572,8 +572,8 @@ net_pcap_close(void *priv)
 }
 
 const netdrv_t net_pcap_drv = {
-    &net_pcap_in_available,
-    &net_pcap_init,
-    &net_pcap_close,
-    NULL
+    .notify_in = &net_pcap_in_available,
+    .init      = &net_pcap_init,
+    .close     = &net_pcap_close,
+    .priv      = NULL
 };