msm: adsprpc: wait at least once before checking work done flag

- After sending message to remote subsystem, try waiting for
response at least once, before checking the "work done" flag that
is updated in the interrupt callback on a response from remote
processor.
- Add context complete ftrace event in the SSR and PDR callbacks
also.
- Remove context from the table first, before cleaning up its
buffers and mappings.
- In the interrupt callback, vote with PM before updating response
type, "work done" flag and completing the work.

Change-Id: I5c9c8ddcfb36036fd6d34fd051d2ffb4d7d700ea
Acked-by: Thyagarajan Venkatanarayanan <venkatan@qti.qualcomm.com>
Acked-by: Amol Maheshwari <amahesh@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>