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/drivers/phy/phy-ti-am654.c b/drivers/phy/phy-ti-am654.c
index 3949012..1c7db0d 100644
--- a/drivers/phy/phy-ti-am654.c
+++ b/drivers/phy/phy-ti-am654.c
@@ -18,6 +18,7 @@
 #include <power-domain.h>
 #include <regmap.h>
 #include <syscon.h>
+#include <linux/err.h>
 
 #define CMU_R07C		0x7c
 #define CMU_MASTER_CDN_O	BIT(24)