sh: Fix compile error for r2dplus

netdev.h was not include by r2dplus.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>

board/r2dplus/r2dplus.c

@@ -23,6 +23,7 @@
 
 #include <common.h>
 #include <ide.h>
+#include <netdev.h>
 #include <asm/processor.h>
 #include <asm/io.h>
 #include <asm/pci.h>