mb/google/poppy: Enable support for DPTF

This patch adds the DPTF settings specfic to the mainboard and enables
the CPU and other thermal sensors as participant device for poppy.
It enables the DPTF flag in the device tree for poppy. It also includes
the DPTF specific ASL file in the main DSDT definition.

BUG=None
BRANCH=None
TEST=Built for poppy.

Change-Id: If44b01dd3c17fea06681ccf50e8e9f406e642e36
Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com>
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/17926
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
diff --git a/src/mainboard/google/poppy/devicetree.cb b/src/mainboard/google/poppy/devicetree.cb
index 07cacc0..1f25821 100644
--- a/src/mainboard/google/poppy/devicetree.cb
+++ b/src/mainboard/google/poppy/devicetree.cb
@@ -19,6 +19,9 @@
 	# EC memory map range is 0x900-0x9ff
 	register "gen3_dec" = "0x00fc0901"
 
+	# Enable DPTF
+	register "dptf_enable" = "1"
+
 	# FSP Configuration
 	register "ProbelessTrace" = "0"
 	register "EnableLan" = "0"
@@ -184,6 +187,7 @@
 
 	register "speed_shift_enable" = "1"
 	register "tdp_pl2_override" = "7"
+	register "tcc_offset" = "10"     # TCC of 90C
 
 	# Use default SD card detect GPIO configuration
 	register "sdcard_cd_gpio_default" = "GPP_G7"