[RESEND PATCH v2 0/3] Introduce Self-Save API for deep stop states

RESEND Changes: 1. Updated OPAL API numbering for consistency Skiboot patches: https://patchwork.ozlabs.org/patch/1221011/ RFC v1 patches: https://lkml.org/lkml/2019/12/4/193 Changelog RFC v1 --> v2 1. Optimized preference bitmask 2. Addressed comments from Ram Pai Currently the stop-API supports

[PATCH v2 0/3] Introduce Self-Save API for deep stop states

RFC v1 patches: https://lkml.org/lkml/2019/12/4/193 Changelog RFC v1 --> v2 1. Optimized preference bitmask 2. Addressed comments from Ram Pai Currently the stop-API supports a mechanism called as self-restore which allows us to restore the values of certain SPRs on wakeup from a deep-stop state t