mb/google/rex/variants/deku: Add basic DTT

Add default Intel DPTF.

BUG=b:305793886
TEST=util/abuild/abuild -p none -t google/rex -x -a -b deku

Signed-off-by: Eran Mitrani <mitrani@google.com>
Change-Id: Id681754fc8e7b418de35f66df097cadd4aad7448
Signed-off-by: Eran Mitrani <mitrani@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79353
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

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

@@ -55,6 +55,11 @@ 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_rp7 on
 			# Enable LAN1 Card PCIE 7 using clk 2
 			register "pcie_rp[PCH_RP(7)]" = "{