Update notes for submitted changes

* aries | p1: zram: use zcomp compressing backends
Update notes for submitted changes

* aries | p1: zram: factor out single stream compression
Update notes for submitted changes

* aries | p1: zram: add multi stream functionality
Update notes for submitted changes

* aries | p1: zram: add set_max_streams knob
Update notes for submitted changes

* aries | p1: zram: make compression algorithm selection possible
Update notes for submitted changes

* aries | p1: zram: add lz4 algorithm backend
Update notes for submitted changes

* aries | p1: zram: move comp allocation out of init_lock
Update notes for submitted changes

* aries | p1: zram: return error-valued pointer from zcomp_create()