drm/nouveau: Fix "general protection fault" in the flipd/flips eviction path.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 1d6036f..365fc65 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -584,7 +584,7 @@
 
 	placement.fpfn = placement.lpfn = 0;
 	placement.num_placement = placement.num_busy_placement = 1;
-	placement.placement = &placement_memtype;
+	placement.placement = placement.busy_placement = &placement_memtype;
 
 	tmp_mem = *new_mem;
 	tmp_mem.mm_node = NULL;
@@ -622,7 +622,7 @@
 
 	placement.fpfn = placement.lpfn = 0;
 	placement.num_placement = placement.num_busy_placement = 1;
-	placement.placement = &placement_memtype;
+	placement.placement = placement.busy_placement = &placement_memtype;
 
 	tmp_mem = *new_mem;
 	tmp_mem.mm_node = NULL;