Revert "msm: Remove all references to CONFIG_ANDROID_PMEM"

This reverts commit 475bd4d84461261996b22f7c9293245c75468392.
Revert "sync: Fix a race condition between release_obj and print_obj"

This reverts commit a31ed1f326ba749eecb8c90d95cb7d6f2b74bb40.