soc: qcom: sleepstate: Send interrupt on state update

SMP2P interrupt is masked to avoid waking up the remote core on
modifying the sleep state bit, but the remote side cannot always
poll for the awake status.

Trigger the SMP2P interrupt to notify the remote core about item update.

Change-Id: I898695558e25d2c0a753f0811a5ea5f30e5deedf
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>