tpm: ibmvtpm: Correct the return value in tpm_ibmvtpm_probe()

Currently it returns zero when CRQ response timed out, it should return
an error code instead.

Fixes: d8d74ea3 ("tpm: ibmvtpm: Wait for buffer to be set before proceeding")
Signed-off-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: NStefan Berger <stefanb@linux.ibm.com>
Acked-by: NJarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: NJarkko Sakkinen <jarkko@kernel.org>

drivers/char/tpm/tpm_ibmvtpm.c

@@ -681,6 +681,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
 	if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
 				ibmvtpm->rtce_buf != NULL,
 				HZ)) {
+		rc = -ENODEV;
 		dev_err(dev, "CRQ response timed out\n");
 		goto init_irq_cleanup;
 	}