Ensure host is told data available on SMS_ATN
Ensure host is told data available on SMS_ATN

The SMS_ATN path is used by OpenBMC to communicate certain commands to
the host. To ensure the host queries OpenBMC for its pending command,
the response to the get_msg_flags command must indicate the event
message buffer is full.

Commit 30206dba changed this behavior and caused a regression in this
area for openpower systems.

Tested:
Verified phosphor-host-check now passes when host is up and running

Resolves openbmc/openbmc#3526

Change-Id: I700a55d8fa35b367dc20ae0db532a0b1c0664fba
Signed-off-by: Andrew Geissler <f7919ac9f8ec0c3ffbc3f483da625c634fd31638@yahoo.com>
Signed-off-by: Vernon Mauery <4fbc0e9805d36da7c621cd4d73f3eb0d5b12b5f3@linux.intel.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid