cassini/niu/sun*: Move the Sun drivers

Moves the Sun drivers into drivers/net/ethernet/sun/ and make
the necessary Kconfig and Makefile changes.

Oliver Hartkopp <socketcan@hartkopp.net> suggested removing the
sun* prefix on the driver names.  This type of change I will
leave up to the driver maintainers.

CC: Sam Creasey <sammy@sammy.net>
CC: Adrian Sun <asun@darksunrising.com>
CC: Benjamin Herrenscmidt <benh@kernel.crashing.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/spider_net.h b/drivers/net/spider_net.h
index 020f64a..a891ad0 100644
--- a/drivers/net/spider_net.h
+++ b/drivers/net/spider_net.h
@@ -27,7 +27,7 @@
 
 #define VERSION "2.0 B"
 
-#include "sungem_phy.h"
+#include "./ethernet/sun/sungem_phy.h"
 
 extern int spider_net_stop(struct net_device *netdev);
 extern int spider_net_open(struct net_device *netdev);