power: pmic: add the max8997 controller for DM

Add the max8997 controller for Driver model.
Exynos4210 is using max8997 pmic controller.
(pmic_max8997.c should be deprecated.)

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/power/pmic/max8998.c b/drivers/power/pmic/max8998.c
index 3baa8da..7c4773c 100644
--- a/drivers/power/pmic/max8998.c
+++ b/drivers/power/pmic/max8998.c
@@ -7,10 +7,10 @@
 
 #include <common.h>
 #include <dm.h>
+#include <errno.h>
 #include <i2c.h>
 #include <power/pmic.h>
 #include <power/max8998_pmic.h>
-#include <errno.h>
 
 DECLARE_GLOBAL_DATA_PTR;