hevc/refs: use ff_hevc_unref_frame
Revert "hevc/refs: use ff_hevc_unref_frame"

This reverts commit 5ab50bc77f98afd16af02653af8fabbefabda3ef.
Revert "hevc: add support for bumping process"

This reverts commit f1e1ab74f6295d2ac3add2d19075c29739bc2945.
hevc: add support for bumping process