msm: ipa4: Add change to stop netdev

As SSR event is not received to APPS, some data
is sent to modem. Add change to stop netdev first
during SSR events and halt the modem channels.

Change-Id: Id62d5f0cf811a30dc796401c15cf1ed6b8425992
Signed-off-by: Praveen Kurapati <pkurapat@codeaurora.org>