drm/nouveau/device: call nvkm_device_fini if nvkm_device_init fails

nvkm_device_fini is never called if a failure occurs in
nvkm_device_init, even when unloading the module. This can lead to a
resources leak (one example is the Tegra interrupt which would never be
freed in that case). Fix this by calling nvkm_device_fini in
nvkm_device_init's failure path.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -2261,6 +2261,8 @@ nvkm_device_init(struct nvkm_device *device)
 	} while (--i >= 0);
 
 fail:
+	nvkm_device_fini(device, false);
+
 	nvdev_error(device, "init failed with %d\n", ret);
 	return ret;
 }