mhi: cntrl: qcom: notify DRV suspend if device wake is set

Host can do a DRV handoff when device wake is set preventing
the device to go to low power modes. Notify DRV processor of
the same so it has device state awareness and acts accordingly
in order to prevent host from attempting low power modes.

Change-Id: I8e3a95b208cce6fed668fa666ac3d338590f9a96
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>