linux-phytec-ti

wil6210: prevent FW download if HW is configured for secured boot

Currently the driver doesn't support secured boot flow, hence
prevent FW download in case HW is configured for such a flow.

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