drm/i915: Tidy error handling in i915_gem_init_hw

Let's reorder things so that we can do onion teardown rather than double
goto.

References: b96f6ebf ("drm/i915: Correctly handle error path in i915_gem_init_hw")
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180712124810.25241-1-michal.winiarski@intel.com

drivers/gpu/drm/i915/i915_gem.c

@@ -5313,13 +5313,17 @@ int i915_gem_init_hw(struct drm_i915_private *dev_priv)
 	ret = __i915_gem_restart_engines(dev_priv);
 	if (ret)
 		goto cleanup_uc;
-out:
+
 	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-	return ret;
+
+	return 0;
 
 cleanup_uc:
 	intel_uc_fini_hw(dev_priv);
-	goto out;
+out:
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+
+	return ret;
 }
 
 static int __intel_engines_record_defaults(struct drm_i915_private *i915)