wil6210: check mid is valid

Check that the mid is valid and that it does not exceed the memory
size allocated to vifs array.

Signed-off-by: Ahmad Masri <amasri@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 files changed