slim: msm: Set Device state to sleep in case of a suspend-timeout

If low-power mode is not entered due to timeout, it is possible that
HW has actually been turned off by ADSP but the response was not
received by driver on apps on time.
Change device state to sleep to make sure HW is woken up for
subsequent runtime-resume operation.

Change-Id: I4e454f7e90e1244985c86286b95202eecfc50a7e
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>