drm/i915/selftests: Include the subsubtest name for live_parallel_engines

Include the name of the failing subsubtest, should it fails.
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/20191123191547.925360-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/selftests/i915_request.c

@@ -1214,10 +1214,12 @@ static int live_parallel_engines(void *arg)
 		return -ENOMEM;
 
 	for (fn = func; !err && *fn; fn++) {
+		char name[KSYM_NAME_LEN];
 		struct igt_live_test t;
 		unsigned int idx;
 
-		err = igt_live_test_begin(&t, i915, __func__, "");
+		snprintf(name, sizeof(name), "%pS", fn);
+		err = igt_live_test_begin(&t, i915, __func__, name);
 		if (err)
 			break;