RootCanal: Validate the Supported Commands mask

Validate the set of supported commands according to the
constraints described in the section Vol 4, Part E § 3 Overview of
commands and events of the specification.

The check is non-fatal but displays instead the commands that
should be or should not be implemented following these rules.

Test: m root-canal
Change-Id: I12751149f77ba4d22b30280edbd6da1ade5ef7e9