[PATCH v2] drm/panel: check failure cases in the probe func

[Sam Ravnborg]

Hi Navid.

On Wed, Jul 24, 2019 at 02:55:34PM -0500, Navid Emamdoost wrote:
> The following function calls may fail and return NULL, so the null check
> is added.
> of_graph_get_next_endpoint
> of_graph_get_remote_port_parent
> of_graph_get_remote_port
> 
> Update: Thanks to Sam Ravnborg, for suggession on the use of goto to avoid
> leaking endpoint.
> 
> Signed-off-by: Navid Emamdoost <navid.emamdoost at gmail.com>
Applied and pushed to drm-misc-next.

	Sam