board: atmel: sama7g5ek: increase arp timeout and retry count

Increase ARP timeout and retry count as this will increase
the speed of communication.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
diff --git a/include/configs/sama7g5ek.h b/include/configs/sama7g5ek.h
index fbf0274..dc6cf4c 100644
--- a/include/configs/sama7g5ek.h
+++ b/include/configs/sama7g5ek.h
@@ -44,4 +44,7 @@
 /* Size of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN		(4 * 1024 * 1024)
 
+#define CONFIG_ARP_TIMEOUT		200
+#define CONFIG_NET_RETRY_COUNT		50
+
 #endif