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>

drivers/sysreset/sysreset_psci.c

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#include <dm/device.h>
+#include <dm.h>
 #include <sysreset.h>
 #include <linux/errno.h>
 #include <linux/psci.h>