slimbus: qcom-ngd: use correct error in message of pdr_add_lookup() failure

Use correct error code, instead of previous 'ret' value, when printing
error from pdr_add_lookup() failure.

Fixes: e1ae85e1 ("slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220916122910.170730-2-srinivas.kandagatla@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/slimbus/qcom-ngd-ctrl.c

@@ -1581,8 +1581,9 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
 
 	pds = pdr_add_lookup(ctrl->pdr, "avs/audio", "msm/adsp/audio_pd");
 	if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) {
+		ret = PTR_ERR(pds);
 		dev_err(dev, "pdr add lookup failed: %d\n", ret);
-		return PTR_ERR(pds);
+		return ret;
 	}
 
 	platform_driver_register(&qcom_slim_ngd_driver);