wil6210: ignore selected WMI events

Some events are ignored for purpose; such events should not
be treated as "unhandled events". Replace info message
saying "unhandled" with debug one saying "ignore", to reduce
dmesg pollution

Change-Id: I143ea0277eb519aa500e97de3567899babe52af2
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: b03fbab0c4d502510400b7ee5fb3d5bab6d859bf
Git-repo: https://github.com/kvalo/ath.git


Signed-off-by: Maya Erez <merez@codeaurora.org>