qbt1000: Initialize drvdata structure before usage

Fix uninitialized local variable error which might have lead to
crash

Bug: 35764241
Change-Id: I3fd95cb343c3175e4190c8ebfe209399db0602a6
CRs-Fixed: 2030137
Signed-off-by: Abir Ghosh <abirg@codeaurora.org>

drivers/soc/qcom/qbt1000.c

@@ -752,13 +752,14 @@ static long qbt1000_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	void __user *priv_arg = (void __user *)arg;
 	struct qbt1000_drvdata *drvdata;
 
+	drvdata = file->private_data;
+
 	if (IS_ERR(priv_arg)) {
 		dev_err(drvdata->dev, "%s: invalid user space pointer %lu\n",
 			__func__, arg);
 		return -EINVAL;
 	}
 
-	drvdata = file->private_data;
 	pm_runtime_get_sync(drvdata->dev);
 	mutex_lock(&drvdata->mutex);
 	if (((drvdata->sensor_conn_type == SPI) && (!drvdata->clock_state)) ||