Xplmi_SsitSendMsgEventAndGetResp
This API provides a generic interface if the primary SLR wants to send/forward
an IPI command to a secondary SLR and get a response. It essentially calls Xplmi_SsitWriteEventBufferAndTriggerMsgEvent() to write
the message event buffer and trigger the event, then Xplmi_SsitWaitForEvent() to wait until the message event is handled by
a secondary SLR or until timeout, and finally calls Xplmi_SsitReadResponse() to read response payload provided by the
secondary SLR after the event is handled.
This API takes a request buffer and response buffer as arguments, the target
SLR index for which the command is intended and the timeout value for completion
wait time.
Note: It is
only supported on the primary SLR.