wil6210: some more debug for the WMI mechanism

Log worker thread start/stop; as well as every handler invocation

Change-Id: I004fd92df7962b33b65cb7df6899e48f1d637e78
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Git-commit: 028e1836d3f218619a6e7f04ff1540c398deb727
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


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