new at91_emac network driver (NET_MULTI api)

* add's at91_emac (AT91RM9200) network driver (NET_MULTI api)
* enable driver with CONFIG_DRIVER_AT91EMAC
* generic PHY initialization
* modify AT91RM9200 boards to use NET_MULTI driver
* the drivers has been tested with LXT971 Phy and DM9161 Phy at
  MII and RMII interface

Signed-off-by: Jens Scharsig <js_at_ng@scharsoft.de>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/cpu/arm920t/at91rm9200/bcm5221.c b/cpu/arm920t/at91rm9200/bcm5221.c
index b52c615..8de3cba 100644
--- a/cpu/arm920t/at91rm9200/bcm5221.c
+++ b/cpu/arm920t/at91rm9200/bcm5221.c
@@ -28,10 +28,10 @@
 
 #include <at91rm9200_net.h>
 #include <net.h>
-#include <bcm5221.h>
-
 #ifdef CONFIG_DRIVER_ETHER
 
+#include <bcm5221.h>
+
 #if defined(CONFIG_CMD_NET)
 
 /*