dm: core: Require users of devres to include the header

At present devres.h is included in all files that include dm.h but few
make use of it. Also this pulls in linux/compat which adds several more
headers. Drop the automatic inclusion and require files to include devres
themselves. This provides a good indication of which files use devres.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
diff --git a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c
index 357d8f7..8c176b9 100644
--- a/fs/yaffs2/yaffs_yaffs1.c
+++ b/fs/yaffs2/yaffs_yaffs1.c
@@ -18,6 +18,7 @@
 #include "yaffs_getblockinfo.h"
 #include "yaffs_nand.h"
 #include "yaffs_attribs.h"
+#include <dm/devres.h>
 
 int yaffs1_scan(struct yaffs_dev *dev)
 {