usb: dwc3: qcom: clean up suspend callbacks

Clean up the suspend callbacks by separating the error and success paths
to improve readability.

Also drop a related redundant initialisation.
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20220804151001.23612-10-johan+linaro@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc3/dwc3-qcom.c

@@ -959,14 +959,15 @@ static int __maybe_unused dwc3_qcom_pm_suspend(struct device *dev)
 {
 	struct dwc3_qcom *qcom = dev_get_drvdata(dev);
 	bool wakeup = device_may_wakeup(dev);
-	int ret = 0;
-
+	int ret;
 
 	ret = dwc3_qcom_suspend(qcom, wakeup);
-	if (!ret)
-		qcom->pm_suspended = true;
+	if (ret)
+		return ret;
 
-	return ret;
+	qcom->pm_suspended = true;
+
+	return 0;
 }
 
 static int __maybe_unused dwc3_qcom_pm_resume(struct device *dev)
@@ -976,10 +977,12 @@ static int __maybe_unused dwc3_qcom_pm_resume(struct device *dev)
 	int ret;
 
 	ret = dwc3_qcom_resume(qcom, wakeup);
-	if (!ret)
-		qcom->pm_suspended = false;
+	if (ret)
+		return ret;
 
-	return ret;
+	qcom->pm_suspended = false;
+
+	return 0;
 }
 
 static int __maybe_unused dwc3_qcom_runtime_suspend(struct device *dev)