mb/google/rex: Enable DPTF functionality for Rex

Enable DPTF functionality for Meteor Lake Rex board.

BUG=b:262498724
TEST=Booted to OS and verified DPTF entries in ACPI SSDT on Rex board.

Change-Id: I87b2d71650be9ce940d9452bf4a76d4cd1ddba52
Signed-off-by: zhaojohn <john.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70884
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/rex/Kconfig

@@ -4,6 +4,8 @@ config BOARD_GOOGLE_REX_COMMON
 	select DRIVERS_GENERIC_MAX98357A
 	select DRIVERS_I2C_GENERIC
 	select DRIVERS_I2C_HID
+	select DRIVERS_INTEL_DPTF
+	select DRIVERS_INTEL_DPTF_SUPPORTS_TPCH
 	select DRIVERS_INTEL_USB4_RETIMER
 	select DRIVERS_SOUNDWIRE_ALC5682
 	select DRIVERS_WIFI_GENERIC

src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb

@@ -14,6 +14,9 @@ chip soc/intel/meteorlake
 	# S0ix enable
 	register "s0ix_enable" = "1"
 
+	# DPTF enable
+	register "dptf_enable" = "1"
+
 	# Enable CNVi BT
 	register "cnvi_bt_core" = "true"
 

src/mainboard/google/rex/variants/rex0/overridetree.cb

@@ -118,6 +118,11 @@ chip soc/intel/meteorlake
 	}"
 
 	device domain 0 on
+		device ref dtt on
+			chip drivers/intel/dptf
+				device generic 0 alias dptf_policy on end
+			end
+		end
 		device ref pcie_rp9 on
 			# Enable SSD Card PCIE 9 using clk 4
 			register "pcie_rp[PCH_RP(9)]" = "{