common: Drop net.h from common header

Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/log.h

@@ -9,6 +9,7 @@
 #ifndef __LOG_H
 #define __LOG_H
 
+#include <stdio.h>
 #include <command.h>
 #include <dm/uclass-id.h>
 #include <linux/list.h>