msm: gsi: fix memory corruption from debugfs

Fix to GSI reset stats logic to clear the correct stats per channel

Change-Id: I94ae8c769ec2868a291e75a2f47c85bd8a449937
CRs-Fixed: 1046484
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>