regulator: mt6397: Move buck modes into header file

This will allow device trees to make use of these constants.
Signed-off-by: Anand K Mistry <amistry@google.com>
Link: https://lore.kernel.org/r/20200702162231.v2.1.Icf69e2041b1af4548347018186c3ba6310f53e66@changeidSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mt6397-regulator.c

@@ -13,9 +13,7 @@
 #include <linux/regulator/machine.h>
 #include <linux/regulator/mt6397-regulator.h>
 #include <linux/regulator/of_regulator.h>
-
-#define MT6397_BUCK_MODE_AUTO	0
-#define MT6397_BUCK_MODE_FORCE_PWM	1
+#include <dt-bindings/regulator/mediatek,mt6397-regulator.h>
 
 /*
  * MT6397 regulators' information

include/dt-bindings/regulator/mediatek,mt6397-regulator.h

+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _DT_BINDINGS_REGULATOR_MEDIATEK_MT6397_H_
+#define _DT_BINDINGS_REGULATOR_MEDIATEK_MT6397_H_
+
+/*
+ * Buck mode constants which may be used in devicetree properties (eg.
+ * regulator-initial-mode, regulator-allowed-modes).
+ * See the manufacturer's datasheet for more information on these modes.
+ */
+
+#define MT6397_BUCK_MODE_AUTO		0
+#define MT6397_BUCK_MODE_FORCE_PWM	1
+
+#endif