platform: msm_shared: Add a separate signal for SSR Channel notification

There is a notification sent from RPM for every channel that is opened.
Sometimes when only one channel notification is used, there is a possiblity
that the second channel may not be open yet on the remote side while the
client has already started to send data. So have a separate signal for
both SSR and RPM Requests channels.

Change-Id: I6b973bd6266e79129d1febc808eb240a19228739
1 file changed