sata, highbank: simplify the return expression of ahci_highbank_suspend

Simplify the return expression.
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/ata/sata_highbank.c

@@ -571,7 +571,6 @@ static int ahci_highbank_suspend(struct device *dev)
 	struct ahci_host_priv *hpriv = host->private_data;
 	void __iomem *mmio = hpriv->mmio;
 	u32 ctl;
-	int rc;
 
 	if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
 		dev_err(dev, "firmware update required for suspend/resume\n");
@@ -588,11 +587,7 @@ static int ahci_highbank_suspend(struct device *dev)
 	writel(ctl, mmio + HOST_CTL);
 	readl(mmio + HOST_CTL); /* flush */
 
-	rc = ata_host_suspend(host, PMSG_SUSPEND);
-	if (rc)
-		return rc;
-
-	return 0;
+	return ata_host_suspend(host, PMSG_SUSPEND);
 }
 
 static int ahci_highbank_resume(struct device *dev)