Fix management of pending deletion list
Fix management of pending deletion list

Fixes a use-after-free.
armsoc_bo_del() frees the list entry, but on next iteration of the
loop, xorg_list_for_each_entry reads the next entry pointer from there.
Use the _safe variant to avoid this.

commshare/xf86-video-armsoc,Popolon/xf86-video-armsoc,commshare/xf86-video-armsoc,Popolon/xf86-video-armsoc