regulator: max77620: Initialize values for DT properties

If regulator DT node doesn't exist, its of_parse_cb callback
function isn't called. Then all values for DT properties are
filled with zero. This leads to wrong register update for
FPS and POK settings.
Signed-off-by: Jinyoung Park <jinyoungp@nvidia.com>
Signed-off-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

drivers/regulator/max77620-regulator.c

 /*
  * Maxim MAX77620 Regulator driver
  *
- * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2016-2018, NVIDIA CORPORATION.  All rights reserved.
  *
  * Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
  *	Laxman Dewangan <ldewangan@nvidia.com>
@@ -803,6 +803,14 @@ static int max77620_regulator_probe(struct platform_device *pdev)
 		rdesc = &rinfo[id].desc;
 		pmic->rinfo[id] = &max77620_regs_info[id];
 		pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
+		pmic->reg_pdata[id].active_fps_src = -1;
+		pmic->reg_pdata[id].active_fps_pd_slot = -1;
+		pmic->reg_pdata[id].active_fps_pu_slot = -1;
+		pmic->reg_pdata[id].suspend_fps_src = -1;
+		pmic->reg_pdata[id].suspend_fps_pd_slot = -1;
+		pmic->reg_pdata[id].suspend_fps_pu_slot = -1;
+		pmic->reg_pdata[id].power_ok = -1;
+		pmic->reg_pdata[id].ramp_rate_setting = -1;
 
 		ret = max77620_read_slew_rate(pmic, id);
 		if (ret < 0)