mb/google/nissa: Configure the DPTF policies based on fw_config

This change adds support to configure the DPTF policies based
on the fw_config THERMAL_SOLUTION.

BUG=b:238713292
TEST=Boot to OS and verify that dptf policies are set based on
fw_config.

Signed-off-by: V Sowmya <v.sowmya@intel.com>
Change-Id: I0ffb9d7cc6c963add001a31ba23a6d6c351dd621
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66589
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Reka Norman <rekanorman@chromium.org>

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

@@ -4,6 +4,10 @@ fw_config
 		option DB_1C_1A			1
 		option DB_1C_LTE		2
 	end
+	field THERMAL_SOLUTION 2
+		option THERMAL_SOLUTION_PASSIVE 0
+		option THERMAL_SOLUTION_ACTIVE  1
+	end
 	field SD_CARD 4
 		option SD_GL9750S		0
 		option SD_ABSENT		1
@@ -161,7 +165,9 @@ chip soc/intel/alderlake
 					[3] = {   8,  500 }
 				}"
 
-				device generic 0 on end
+				device generic 0 on
+					probe THERMAL_SOLUTION THERMAL_SOLUTION_PASSIVE
+				end
 			end
 		end
 		device ref ipu on