vga_switcheroo: simplify the return expression of vga_switcheroo_runtime_resume

Simplify the return expression.
Signed-off-by: NQinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200921131110.93365-1-miaoqinglang@huawei.com

drivers/gpu/vga/vga_switcheroo.c

@@ -1034,17 +1034,12 @@ static int vga_switcheroo_runtime_suspend(struct device *dev)
 static int vga_switcheroo_runtime_resume(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
-	int ret;
 
 	mutex_lock(&vgasr_mutex);
 	vga_switcheroo_power_switch(pdev, VGA_SWITCHEROO_ON);
 	mutex_unlock(&vgasr_mutex);
 	pci_wakeup_bus(pdev->bus);
-	ret = dev->bus->pm->runtime_resume(dev);
-	if (ret)
-		return ret;
-
-	return 0;
+	return dev->bus->pm->runtime_resume(dev);
 }
 
 /**