Add back an interface used by an external provider

The move to the new API removed the ipmid_get_sdbus_plus_handler
interface because it looked like it was self-contained in the
executable, not realizing it was needed by an external provider.

Change-Id: I75bb898294cc59cae7d291f7a6a6ed1e61d62903
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
2 files changed