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/drivers/clk/clk_zynqmp.c b/drivers/clk/clk_zynqmp.c
index 694274d..50eaf31 100644
--- a/drivers/clk/clk_zynqmp.c
+++ b/drivers/clk/clk_zynqmp.c
@@ -9,8 +9,8 @@
 #include <common.h>
 #include <linux/bitops.h>
 #include <clk-uclass.h>
-#include <dm/device.h>
 #include <clk.h>
+#include <dm.h>
 
 #define ZYNQMP_GEM0_REF_CTRL		0xFF5E0050
 #define ZYNQMP_IOPLL_CTRL		0xFF5E0020