wil6210: prevent access to RGF_CAF_ICR in Talyn

Due to access control RGF_CAF_ICR cannot be accessed by host.
Such an access will cause device AHB logger to halt and it will not
capture future AHB fault if there is any.

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