msm: adsprpc: Add logs to identify thread exit called

Added debug logs to identify whether thread exit is called
when ioctl call interrupted.

Change-Id: I5129237ee90ad80402f8f52b20dd015bc03cd0fc
Acked-by: Krishnaiah Tadakamalla <ktadakam@qti.qualcomm.com>
Signed-off-by: Jeya R <jeyr@codeaurora.org>