msm: gsi: check channel state on timeout

In some cases of stopping a channel,
the CH CTRL interrupt arrives late even though the channel is
already stopped. This change will check the channel state after
timeout occurs.

CRs-Fixed: 2090459
Change-Id: I4b99e8fb6710dca16047025a614fb734995934a1
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>