wil6210: trace disconnect source

Trace where wil6210_disconnect() is called from.

Change-Id: Id696bf28cf8f12301955ead6d4f5181a4dca6f11
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: de9084ef47eb4014a7ca3ccbffce285ddc2130ce
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>