mb/google/nissa/var/craask: Enable DDR RFIM Policy for Craask

Enable RFIM Policy, request by RF team.

BUG=b:239657092
TEST=emerge-nissa coreboot

Signed-off-by: Tyler Wang <tyler.wang@quanta.corp-partner.google.com>
Change-Id: Id0f425d75a1ac9486a9284d4e8320ba4c63b182f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66583
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Reka Norman <rekanorman@chromium.org>
Reviewed-by: David Wu <david_wu@quanta.corp-partner.google.com>
diff --git a/src/mainboard/google/brya/variants/craask/overridetree.cb b/src/mainboard/google/brya/variants/craask/overridetree.cb
index 3a3203f..77a9e72 100644
--- a/src/mainboard/google/brya/variants/craask/overridetree.cb
+++ b/src/mainboard/google/brya/variants/craask/overridetree.cb
@@ -180,6 +180,12 @@
 			probe WFC WFC_MIPI_OVTI5675
 			probe WFC WFC_MIPI_OVTI8856
 		end
+		device ref cnvi_wifi on
+			chip drivers/wifi/generic
+				register "enable_cnvi_ddr_rfim" = "true"
+				device generic 0 on end
+			end
+		end
 		device ref i2c1 on
 			chip drivers/i2c/hid
 				register "generic.hid" = ""ELAN6915""