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

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>