soc/intel/cnl/acpi: add ish ACPI device

Create the ISH ACPI device so we can hang fields off of a _DSD table.

Since this is also a PCI device that has run time probing, we can always
emit the ACPI device and let the device tree turn the device on or off.

BRANCH=none
BUG=b:122722008
TEST=verify that _DSD table gets publish under ISH device in kernel ACPI
tables. Also verified that device is still turned off if device tree for
ISH is off.

Change-Id: Ic0231f1ac637fea0e251eb3ac84f0fd8d64c12b2
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://review.coreboot.org/c/31681
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/cannonlake/acpi/ish.asl

@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/* Intel Integrated Sensor Hub Controller 0:13.0 */
+
+Device (ISHB)
+{
+	Name (_ADR, 0x00130000)
+	Name (_DDN, "Integrated Sensor Hub Controller")
+}

src/soc/intel/cannonlake/acpi/southbridge.asl

@@ -51,6 +51,9 @@
 /* SMBus 0:1f.4 */
 #include "smbus.asl"
 
+/* ISH 0:13.0 */
+#include "ish.asl"
+
 /* USB XHCI 0:14.0 */
 #include "xhci.asl"