[PATCH] drm/virtio: remove some redundant code

[Dan Carpenter]

On Tue, Jul 11, 2023 at 05:00:31PM +0800, Su Hui wrote:
> virtio_gpu_get_vbuf always be successful,
> so remove the error judgment.
> 

No, just ignore the static checker false positive in this case.  The
intent of the code is clear that if it did have an error it should
return an error pointer.

regards,
dan carpenter