msm: gsi: Add changes to capture wdi channel health

For wdi channels we have different logic to moniter
channel health as compared to gpi channels. Now
adding changes on existing channel stats api to
capture health for wdi channels.

Change-Id: Ice99e5aee40e3cc30545d2dfd95d6e85007d8c9d
Signed-off-by: Piyush Dhyani <pdhyani@codeaurora.org>
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>