drm/i915/selftests: Skip huge pages live tests if wedged

We test the GPU handling of huge pages by submitting requests that write
into a huge page, but if the GPU is irrecoverably wedged we cannot
submit any requests. As the test expectedly fails, skip over it.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180706065332.15214-8-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/selftests/huge_pages.c

@@ -1748,6 +1748,9 @@ int i915_gem_huge_page_live_selftests(struct drm_i915_private *dev_priv)
 		return 0;
 	}
 
+	if (i915_terminally_wedged(&dev_priv->gpu_error))
+		return 0;
+
 	file = mock_file(dev_priv);
 	if (IS_ERR(file))
 		return PTR_ERR(file);