drm/i915: Mark the GPU as wedged without error on fault injection

If we have been instructed (by CI) to inject a fault to load the module
with a wedged GPU, do so quietly less we upset CI.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180607134558.31150-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gem.c

@@ -5491,6 +5491,8 @@ int i915_gem_init(struct drm_i915_private *dev_priv)
 	}
 
 	if (i915_inject_load_failure()) {
+		DRM_DEBUG_DRIVER("Marking the driver as wedged\n");
+		i915_gem_set_wedged(dev_priv);  /* Fail silently! */
 		ret = -EIO;
 		goto err_init_hw;
 	}