net/arp: Do not run net_start_again() on timeout

net_start_again() will be called from net_loop() if state is NETLOOP_FAIL.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/net/arp.c b/net/arp.c
index b865570..b1f12bf 100644
--- a/net/arp.c
+++ b/net/arp.c
@@ -112,7 +112,7 @@
 		if (arp_wait_try >= ARP_TIMEOUT_COUNT) {
 			puts("\nARP Retry count exceeded; starting again\n");
 			arp_wait_try = 0;
-			net_start_again();
+			net_set_state(NETLOOP_FAIL);
 		} else {
 			arp_wait_timer_start = t;
 			arp_request();