Change in coreboot[master]: drivers/acpi: Add device tree driver to generate thermal zone

[Raul Rangel (Code Review)]

Attention is currently required from: Furquan Shaikh, Tim Wawrzynczak.
Hello build bot (Jenkins), Furquan Shaikh, Tim Wawrzynczak,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/54132

to look at the new patch set (#3).

Change subject: drivers/acpi: Add device tree driver to generate thermal zone
......................................................................

drivers/acpi: Add device tree driver to generate thermal zone

Given the following device tree entry:
    chip drivers/acpi/thermal_zone
        register "description" = ""SOC""

use chrome_ec as temperature_controller
        register "sensor_id" = "0"

register "polling_period" = "10"

# EC is configured to power off the system at 92C, so add one degree of buffer
        # so the OS can gracefully shutdown
        register "critical_temperature" = "91"

# EC is configured to assert PROCHOT at 90C. That drastically lowers
        # performance. Instead we will tell the OS to start throttling the CPUs at
        # 85C in hopes that we don't hit the PROCHOT limit.
        register "passive_config" = "{
            .temperature = 85,
        }"

device generic 0 on end
    end

It will generate the following:
    Scope (_TZ)
    {
        ThermalZone (TM00)
        {
            Name (_STR, "CPU")  // _STR: Description String
            Name (_RTV, Zero)  // _RTV: Relative Temperature Values
            Name (_TZP, 0x64)  // _TZP: Thermal Zone Polling
            Name (_CRT, 0x0E39)  // _CRT: Critical Temperature
            Name (_PSV, 0x0DFD)  // _PSV: Passive Temperature
            Name (_PSL, Package (0x10)  // _PSL: Passive List
            {
                _SB.CP00,
                _SB.CP01,
                _SB.CP02,
                _SB.CP03,
                _SB.CP04,
                _SB.CP05,
                _SB.CP06,
                _SB.CP07,
                _SB.CP08,
                _SB.CP09,
            })
            Name (_TC1, 0x02)  // _TC1: Thermal Constant 1
            Name (_TC2, 0x05)  // _TC2: Thermal Constant 2
            Name (_TSP, 0x14)  // _TSP: Thermal Sampling Period
            Method (_TMP, 0, Serialized)  // _TMP: Temperature
            {
                Return (_SB.PCI0.LPCB.EC0.TSRD (Zero))
            }
        }
    }

BUG=b:186166365
TEST=Boot guybrush to OS and verify thermal zone works

Signed-off-by: Raul E Rangel 
Change-Id: Iee2a42db749f18eef6c3f73cdbb3441567301e5d
---
A src/drivers/acpi/thermal_zone/Kconfig
A src/drivers/acpi/thermal_zone/Makefile.inc
A src/drivers/acpi/thermal_zone/chip.h
A src/drivers/acpi/thermal_zone/thermal_zone.c
4 files changed, 209 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/32/54132/3