soc: qcom: glink: Panic if intent for SSR notification to RPM fails

When sending SSR notifications, it is a fatal error if the intent for
the notification to RPM cannot be queued. However, the G-Link SSR driver
does not treat this case as a fatal error, but instead continues
processing.

Panic if an intent to RPM cannot be queued.

Change-Id: Ib158f6cf9cd647651f42db79625886b266c9b428
Signed-off-by: Steven Cahail <scahail@codeaurora.org>