msm: ADSPRPC: Add subsystem states for restart, up and down

Current subsystem state flag cannot define all state of the subsystem.
Different handling might be needed for different subsystem states.
Add multiple subsystem state support.

Change-Id: Id091dfded583c8cd7e95c0d306de6dd34b03485d
Signed-off-by: Abhinav Parihar <quic_parihar@quicinc.com>