mb/google/brya/variants/craask: Enable DDR RFIM Policy for Craask

DDR interfaces emit electromagnetic radiation which can couple
to the antennas of various radios that are integrated in the system,
and cause radio frequency interference (RFI). The DDR Radio Frequency
Interference Mitigation (DDR RFIM) feature is primarily aimed at
resolving narrowband RFI from DDR4/5 and LPDDR4/5 technologies
for the Wi-Fi high and ultra-high bands (~5-7 GHz).
This patch sets CnviDdrRfim UPD and enables CNVI DDR RFIM feature
for Craask variant.
Refer to Intel doc:640438 and doc:690608 for more details.

BUG=None
BRANCH=None
TEST=Build and boot Craask.
- Verified that Wifi DDR RFIM Feature is enabled and DDR RFI table can be modified.

Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Change-Id: I5560bbedb26e88edd9d35f16b639fe63ef42c30e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78453
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>

src/mainboard/google/brya/variants/craask/overridetree.cb

@@ -316,6 +316,14 @@ chip soc/intel/alderlake
 			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" = ""GTCH7502""