soc: qcom: Separate out qmi handle destruction and PD notification

This patch move qmi handle destruction in a new function which is
executed in a worker thread and PD notification is issued in
blocking call. This  avoid issue of late PD notification due to
delay in qmi handle destruction.

Change-Id: I0c7efa336f7849ffde95143e3a0134ebb9e33022
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>