util/sconfig: Add LPC and ESPI buses

Picasso has an LPC and eSPI bridge on the same PCI DEVFN. They can both
be active at the same time. This adds a way to specify which devices
belong on which bus.

i.e.,
device pci 14.3 on  # - D14F3 bridge
	device espi 0 on
		chip ec/google/chromeec
			device pnp 0c09.0 on end
		end
	end
	device lpc 0 on
	end
end

BUG=b:154445472
TEST=Built trembyle and saw static.c contained the espi bus.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I0c2f40813c05680f72e5f30cbb13617e8f994841
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/device/device_util.c

@@ -215,6 +215,14 @@ const char *dev_path(const struct device *dev)
 			snprintf(buffer, sizeof(buffer), "MMIO: %08lx",
 				 dev->path.mmio.addr);
 			break;
+		case DEVICE_PATH_ESPI:
+			snprintf(buffer, sizeof(buffer), "ESPI: %08lx",
+				 dev->path.espi.addr);
+			break;
+		case DEVICE_PATH_LPC:
+			snprintf(buffer, sizeof(buffer), "LPC: %08lx",
+				 dev->path.lpc.addr);
+			break;
 		default:
 			printk(BIOS_ERR, "Unknown device path type: %d\n",
 			       dev->path.type);