NetBSD portability

--- wpa_supplicant/ctrl_iface.c.orig	2019-08-07 08:25:25.000000000 -0500
+++ wpa_supplicant/ctrl_iface.c	2020-03-23 19:21:28.126852258 -0500
@@ -11,7 +11,14 @@
 #include <netinet/ip.h>
 #endif /* CONFIG_TESTING_OPTIONS */
 
+#ifdef __NetBSD__
+#include <net/if_ether.h>
+/* Avoid conflicts due to NetBSD net/if.h if_type define with driver.h */
+#undef if_type
+#else
 #include <net/ethernet.h>
+#endif
+
 #include "utils/common.h"
 #include "utils/eloop.h"
 #include "utils/uuid.h"