vfio: platform: simplify device removal

vfio_platform_remove_common() cannot return non-NULL in
vfio_amba_remove() as the latter is only called if vfio_amba_probe()
returned success.

Diagnosed-by: Arnd Bergmann <[e-mail]>
Acked-by: Eric Auger <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Uwe Kleine-König <[e-mail]>

drivers/vfio/platform/vfio_amba.c

···
 
 static int vfio_amba_remove(struct amba_device *adev)
 {
-	struct vfio_platform_device *vdev;
+	struct vfio_platform_device *vdev =
+		vfio_platform_remove_common(&adev->dev);
 
-	vdev = vfio_platform_remove_common(&adev->dev);
-	if (vdev) {
-		kfree(vdev->name);
-		kfree(vdev);
-		return 0;
-	}
-
-	return -EINVAL;
+	kfree(vdev->name);
+	kfree(vdev);
+	return 0;
 }
 
 static const struct amba_id pl330_ids[] = {