rpmsg: glink: Pass channel to qcom_glink_send_close_ack()

Align the qcom_glink_send_close_ack() arguments with other functions to
take the struct glink_channel, so that the upcoming tracepoint patch can
access the channel attributes.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Chris Lew <quic_clew@quicinc.com>
Link: https://lore.kernel.org/r/20240805-glink-tracepoints-v1-2-a5f3293fb09e@quicinc.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>