glink-debugfs: Add channel remote edge and state to debugfs

It is advisable to have remote state and edge information
of channels for ease in debugging.

Replace  tx and rx packet count of a channel with remote
edge and state of that channel in the debugfs file.

Change-Id: I3e5f3c80f6a5645a215e751a80eb81fbf679717a
Signed-off-by: Atish Kumar Patra <apatra@codeaurora.org>