soc/intel/apollolake: Configure ACPI name for PCIe

This implements acpi name for PCIe root port.

BUG=chrome-os-partner:56483

Change-Id: Ifec1529c477f554d36f3932b66f62eea782fdcaa
Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>
Reviewed-on: https://review.coreboot.org/16621
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/soc/intel/apollolake/chip.c

@@ -102,6 +102,9 @@ static const char *soc_acpi_name(struct device *dev)
 		return "EMMC";
 	case SDIO_DEVFN:
 		return "SDIO";
+	/* PCIe */
+	case PCIEB0_DEVFN:
+		return "RP01";
 	}
 
 	return NULL;