qseecom: don't unregister listener when data->released is true

Don't unregister listener when data->released is true and only update
listener id in private data when listener is registered successfully,
to avoid unnecessary unregister operation.

Change-Id: I10c3b353ae93a0366d6ea00416cbbe35a6d4ec36
Signed-off-by: Zhen Kong <zkong@codeaurora.org>