drm/etnaviv: fix failure path if model is zero

Fix the failure path to call pm_runtime_mark_last_busy() when failing
due to the model field being zero.

Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

@@ -511,8 +511,8 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 
 	if (gpu->identity.model == 0) {
 		dev_err(gpu->dev, "Unknown GPU model\n");
-		pm_runtime_put_autosuspend(gpu->dev);
-		return -ENXIO;
+		ret = -ENXIO;
+		goto fail;
 	}
 
 	ret = etnaviv_hw_reset(gpu);