Remove #if NEN > 0 in the name of FreeBSD - it's not required as config

only compiles this file if it's true.  NEN is still used though. :-(

sys/dev/en/midway.c

@@ -108,7 +108,7 @@
 #endif /* EN_DEBUG */
 
 #ifdef __FreeBSD__
-#include "en.h"
+#include "en.h"			/* XXX for midwayvar.h's NEN */
 #include "opt_inet.h"
 #include "opt_natm.h"
 #include "opt_ddb.h"
@@ -119,8 +119,6 @@
 #endif
 #endif
 
-#if NEN > 0 || !defined(__FreeBSD__)
-
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/queue.h>
@@ -3446,5 +3444,3 @@ int unit, addr, len;
   return(0);
 }
 #endif
-
-#endif /* NEN > 0 || !defined(__FreeBSD__) */