Add Cannon Point PCH Thermal Controller Device ID.

PR:	249047
Reported by: Dries Michiels <driesm.michiels at gmail.com>
--This line, and those below, will be ignored--
> Description of fields to fill in above:                     76 columns --|
> PR:                       If and which Problem Report is related.
> Submitted by:             If someone else sent in the change.
> Reported by:              If someone else reported the issue.
> Reviewed by:              If someone else reviewed your modification.
> Approved by:              If you needed approval for this commit.
> Obtained from:            If the change is from a third party.
> MFC after:                N [day[s]|week[s]|month[s]].  Request a reminder email.
> MFH:                      Ports tree branch name.  Request approval for merge.
> Relnotes:                 Set to 'yes' for mention in release notes.
> Security:                 Vulnerability reference (one per line) or description.
> Sponsored by:             If the change was sponsored by an organization (each collaborator).
> Differential Revision:    https://reviews.freebsd.org/D### (*full* phabric URL needed).
> Empty fields above will be automatically removed.

M    pchtherm.c

sys/dev/intel/pchtherm.c

@@ -95,6 +95,8 @@ static const struct pci_device_table pchtherm_devices[] =
 	  PCI_DESCR("Skylake PCH Thermal Subsystem")},
 	{ PCI_DEV(0x8086, 0xa131),
 	  PCI_DESCR("Skylake PCH 100 Thermal Subsystem")},
+	{ PCI_DEV(0x8086, 0x9df9),
+	  PCI_DESCR("Cannon Lake PCH Thermal Controller")},
 };
 
 static int pchtherm_probe(device_t dev)