[hw,gpio,rtl] Add template description file

Signed-off-by: Robert Schilling <[email protected]>

Author: Razer6

hw/ip_templates/gpio/data/gpio.tpldesc.hjson

@@ -0,0 +1,19 @@
+// Copyright lowRISC contributors (OpenTitan project).
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+{
+  template_param_list: [
+    {
+      name: "topname"
+      desc: "Name of top-level design, e.g., 'darjeeling' or 'earlgrey'"
+      type: "string"
+      default: ""
+    }
+    {
+      name: "module_instance_name"
+      desc: "instance name in case there are multiple gpio instances"
+      type: "string"
+      default: "gpio"
+    }
+  ]
+}