trivial error. (buck1_idx->buck2_idx in the context of buck2 control)

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/regulator/max8998.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
index 5c20756..6413e80 100644
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -448,10 +448,10 @@ buck1_exit:
 			, i, max8998->buck2_vol[0], max8998->buck2_vol[1]);
 		if (gpio_is_valid(pdata->buck2_set3)) {
 			if (max8998->buck2_vol[0] == i) {
-				max8998->buck1_idx = 0;
+				max8998->buck2_idx = 0;
 				buck2_gpio_set(pdata->buck2_set3, 0);
 			} else {
-				max8998->buck1_idx = 1;
+				max8998->buck2_idx = 1;
 				ret = max8998_get_voltage_register(rdev, &reg,
 								   &shift,
 								   &mask);
-- 
1.7.1

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