msm: camera: Initialize power down settings size

Initialize power down settings size before update the
power down settings to avoid using invalid size.

Change-Id: I7a444f7dcf00d3162627302b295926b13511609c
Signed-off-by: Soundrapandian Jeyaprakash <jsoundra@codeaurora.org>
diff --git a/drivers/media/platform/msm/camera/cam_sensor_module/cam_sensor_utils/cam_sensor_util.c b/drivers/media/platform/msm/camera/cam_sensor_module/cam_sensor_utils/cam_sensor_util.c
index 40a8c179..06590e4 100644
--- a/drivers/media/platform/msm/camera/cam_sensor_module/cam_sensor_utils/cam_sensor_util.c
+++ b/drivers/media/platform/msm/camera/cam_sensor_module/cam_sensor_utils/cam_sensor_util.c
@@ -571,6 +571,7 @@
 	if (!power_info->power_setting)
 		return -ENOMEM;
 
+	power_info->power_down_setting_size = 0;
 	power_info->power_down_setting =
 		(struct cam_sensor_power_setting *)
 		kzalloc(sizeof(struct cam_sensor_power_setting) *