drm/i915: Rename request->list to link for consistency

We use "list" to denote the list and "link" to denote an element on that
list. Rename request->list to match this idiom.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-14-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index ecf4278..76ddc7c 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2235,7 +2235,7 @@
 
 	req = list_entry(engine->request_list.prev,
 			 struct drm_i915_gem_request,
-			 list);
+			 link);
 
 	/* Make sure we do not trigger any retires */
 	return __i915_wait_request(req,
@@ -2284,7 +2284,7 @@
 	 */
 	GEM_BUG_ON(!req->reserved_space);
 
-	list_for_each_entry(target, &engine->request_list, list) {
+	list_for_each_entry(target, &engine->request_list, link) {
 		unsigned space;
 
 		/*
@@ -2302,7 +2302,7 @@
 			break;
 	}
 
-	if (WARN_ON(&target->list == &engine->request_list))
+	if (WARN_ON(&target->link == &engine->request_list))
 		return -ENOSPC;
 
 	return i915_wait_request(target);