There are many instances where outside DP peer reference is
used. This may lead to potential invalid access as the peer
reference used outside DP can be deleted in peer unmap. So
implement DP ops to give peer handle by incrementing peer ref
count and also to decrement the peer ref count.
Change-Id: I54b131e4ce4fde888e5d0e69f81c6da8633e2787
CRs-Fixed: 2307529