*: simplify Ethernet header includes

Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking/zcip.c

@@ -35,14 +35,12 @@
 //usage:     "\nWith no -q, runs continuously monitoring for ARP conflicts,"
 //usage:     "\nexits only on I/O errors (link down etc)"
 
+#include "libbb.h"
 #include <netinet/ether.h>
-#include <net/ethernet.h>
 #include <net/if.h>
 #include <net/if_arp.h>
-#include <linux/if_packet.h>
 #include <linux/sockios.h>
 
-#include "libbb.h"
 #include <syslog.h>
 
 /* We don't need more than 32 bits of the counter */