disp: msm: attach address space to msm_gem_object

Ensure the msm_gem_object gets a reference to valid address space
so that sg sync can be properly performed.

Change-Id: Iee7cf49689861b863b3b3bfb3b4b9919ad17caa9
Signed-off-by: Steve Cohen <cohens@codeaurora.org>

msm/msm_gem.c

@@ -348,6 +348,7 @@ static struct msm_gem_vma *add_vma(struct drm_gem_object *obj,
 		return ERR_PTR(-ENOMEM);
 
 	vma->aspace = aspace;
+	msm_obj->aspace = aspace;
 
 	list_add_tail(&vma->list, &msm_obj->vmas);