drm/nouveau/drm/nouveau: tegra: Call nouveau_drm_device_init()

As part of commit cfea88a4 ("drm/nouveau: Start using new drm_dev
initialization helpers"), the initialization of the Nouveau DRM device
was reworked and along the way the platform driver initialization was
left incomplete. Add a call to nouveau_drm_device_init() to make sure
all of the structures are properly initialized.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -1171,10 +1171,16 @@ nouveau_platform_device_create(const struct nvkm_device_tegra_func *func,
 		goto err_free;
 	}
 
+	err = nouveau_drm_device_init(drm);
+	if (err)
+		goto err_put;
+
 	platform_set_drvdata(pdev, drm);
 
 	return drm;
 
+err_put:
+	drm_dev_put(drm);
 err_free:
 	nvkm_device_del(pdevice);