soc: qcom: glink_smd_xprt: Fix race condition of open ack

Open ack is received in separate work queue than process_open_event.
It causes race condition since process_open_event and process_status_event
might get scheduled before glink is notified about open ack.

Glink will be notified about ack in process_open_event.

CRs-Fixed: 974508
Change-Id: Ie03a4914c2655ae5140a740cde73b06bb6d43291
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>