Kernel 5.10 introduce new lockless printk ringbuffer.
This patch dump the new log record, with:

1. treat caller_id as dict info
2. no dev_info support, because no user yet
3. only 5.10 finalized format, not intermit impl in git-tree

This patch unified vmcore & symbol version:

1. vmcore version pre-read prb ptr value
2. pass desired readmem addrtype

https://github.com/crash-utility/crash/pull/71