GPIO refactored (#495)

* **Refactor**
  * GPIO subsystem moved to a descriptor-based model for per-pin ownership and runtime pin management; many platform drivers now acquire/release descriptors.
  * Device trees and drivers now use GPIO phandle-style pin specifications across all boards and all drivers.

* **Behavior**
  * Device list now encodes per-device status (ok/disabled); boot will skip disabled devices accordingly.

* **Deprecation**
  * Legacy GPIO HAL marked deprecated and replaced with descriptor-based interfaces.

* **Chores**
  * Bindings and platform configs updated to the new GPIO pin-spec format.

Buildscripts/DevicetreeCompiler/tests/data/bindings/test,device.yaml

@@ -4,11 +4,9 @@ properties:
   reg:
     type: int
     required: true
-  status:
-    type: string
   boolean-prop:
     type: boolean
   int-prop:
     type: int
   string-prop:
-    type: string
+    type: string

Buildscripts/DevicetreeCompiler/tests/data/test.dts

@@ -6,7 +6,7 @@
     compatible = "test,root";
     model = "Test Model";
 
-    test_device: test-device@0 {
+    test_device1: test-device@0 {
         compatible = "test,device";
         reg = <0>;
         status = "okay";