dm: Use dm.h header when driver mode is used

This header includes things that are needed to make driver build. Adjust
existing users to include that always, even if other dm/ includes are
present

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-uniphier/pinctrl-glue.c b/arch/arm/mach-uniphier/pinctrl-glue.c
index c52c6a6..725569f 100644
--- a/arch/arm/mach-uniphier/pinctrl-glue.c
+++ b/arch/arm/mach-uniphier/pinctrl-glue.c
@@ -6,9 +6,8 @@
  */
 
 #include <linux/errno.h>
-#include <dm/device.h>
+#include <dm.h>
 #include <dm/pinctrl.h>
-#include <dm/uclass.h>
 
 #include "init.h"