regulator: s5m8767: Simplify s5m8767_set_voltage_time_sel implementation

Signed-off-by: Axel Lin <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/s5m8767.c

···
 					     unsigned int new_sel)
 {
 	struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
-	const struct sec_voltage_desc *desc;
-	int reg_id = rdev_get_id(rdev);
-
-	desc = reg_voltage_map[reg_id];
 
 	if ((old_sel < new_sel) && s5m8767->ramp_delay)
-		return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
+		return DIV_ROUND_UP(rdev->desc->uV_step * (new_sel - old_sel),
 					s5m8767->ramp_delay * 1000);
 	return 0;
 }