inteltool: add support for CannonPoint-LP

Add support for CannonPoint-LP U Premium
(CoffeeLake-U and WhiskeyLake-U)

GPIO info taken from:
- Intel doc #337867-002
- coreboot soc/intel/cannonlake/include/soc/gpio_soc_defs.h

Test: Read GPIOs from out-of-tree WhiskeyLake-U board

Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Change-Id: I70f23eec71abb8d7c2a7a109c9e760bb31dee2ff
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39393
Reviewed-by: Michael Niewöhner
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/inteltool/powermgt.c

@@ -837,6 +837,7 @@ int print_pmbase(struct pci_dev *sb, struct pci_access *pacc)
 
 	case PCI_DEVICE_ID_INTEL_CM236:
 	case PCI_DEVICE_ID_INTEL_C236:
+	case PCI_DEVICE_ID_INTEL_CANNONPOINT_LP_U_PREM:
 		acpi = pci_get_dev(pacc, sb->domain, sb->bus, sb->dev, 2);
 		if (!acpi) {
 			printf("PMC device not found.\n");