soc: qcom: handle wdsp glink state notifications

When WDSP has crashed, G-link link state is updated with
GLINK_LINK_STATE_DOWN and remote side channels are closed.
Handle the link state down notification from G-link and
close the channels from local side when remote disconnect
channel event occurs.

Change-Id: Id956256fbb3ea6b18a3685a34dcd1f9b16e71e92
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>