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Add freeze, thaw, and restore callbacks for hibernate and restore functionality. Link: https://lore.kernel.org/r/20230202161045.3956-2-quic_ahari@quicinc.com Signed-off-by: Anjana Hari <quic_ahari@quicinc.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>