[protocol] Add missed entries to CommandType::from
[protocol] Add missed entries to CommandType::from

Add a few conversions that were missing from the `From` trait
implementation for `CommandType`.

Signed-off-by: Kesavan Yogeswaran <dbf113afaa16de09db05538e678c36185bbc2eb2@google.com>

lowRISC/manticore,lowRISC/manticore,lowRISC/manticore