drm/i915: Rename vma->*_list to *_link for consistency

Elsewhere we have adopted the convention of using '_link' to denote
elements in the list (and '_list' for the actual list_head itself), and
that the name should indicate which list the link belongs to (and
preferrably not just where the link is being stored).

s/vma_link/obj_link/ (we iterate over obj->vma_list)
s/mm_list/vm_link/ (we iterate over vm->[in]active_list)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 368d111..31eb0b2 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -194,9 +194,9 @@
 	struct i915_ggtt_view ggtt_view;
 
 	/** This object's place on the active/inactive lists */
-	struct list_head mm_list;
+	struct list_head vm_link;
 
-	struct list_head vma_link; /* Link in the object's VMA list */
+	struct list_head obj_link; /* Link in the object's VMA list */
 
 	/** This vma's place in the batchbuffer or on the eviction list */
 	struct list_head exec_list;