aarch64/raspberrypi: Add Watchdog Timer driver

spec/build/bsps/aarch64/raspberrypi/bspraspberrypi4.yml

@@ -57,6 +57,8 @@ links:
   uid: objgpio
 - role: build-dependency
   uid: objspi
+- role: build-dependency
+  uid: objwatchdog
 source:
 - bsps/aarch64/raspberrypi/console/console.c
 - bsps/aarch64/raspberrypi/start/bspstart.c

spec/build/bsps/aarch64/raspberrypi/objwatchdog.yml

@@ -0,0 +1,17 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: objects
+cflags: []
+copyrights:
+  - Copyright (C) 2024 Ning Yang
+cppflags: []
+cxxflags: []
+enabled-by: true
+includes: []
+install:
+  - destination: ${BSP_INCLUDEDIR}/bsp
+    source:
+      - bsps/aarch64/raspberrypi/include/bsp/watchdog.h
+links: []
+source:
+  - bsps/aarch64/raspberrypi/start/watchdog.c
+type: build