inteltool: Start adding Bay Trail

- Add silvermont (Bay Trail core) MSRs - these are shared with
rangeley/avoton.
- Add GPIO values and GPIO muxing information.
- Add Bay Trail to the PM list.

Still to do:
- Northbridge functionality (RCBA, Memory timings, etc.)
- Add Graphics registers

Change-Id: I9fe0c0f1efe5f4344aeb3bad3f13037555109060
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7711
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

util/inteltool/powermgt.c

@@ -705,6 +705,7 @@ int print_pmbase(struct pci_dev *sb, struct pci_access *pacc)
 	case PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_FULL:
 	case PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_PREM:
 	case PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_BASE:
+	case PCI_DEVICE_ID_INTEL_BAYTRAIL_LPC:
 		pmbase = pci_read_word(sb, 0x40) & 0xff80;
 		pm_registers = pch_pm_registers;
 		size = ARRAY_SIZE(pch_pm_registers);