[DeviceDrivers] change cmd type.

1. Change 'rt_uint8_t' type of cmd to 'int';
2. Add waitqueue;
3. Split device ipc header files;

components/drivers/include/ipc/waitqueue.h

@@ -0,0 +1,39 @@
+#ifndef WAITQUEUE_H__
+#define WAITQUEUE_H__
+
+#include <rtthread.h>
+
+struct rt_wqueue_node;
+
+typedef rt_list_t rt_wqueue_t;
+typedef int (*rt_wqueue_func_t)(struct rt_wqueue_node *wait, void *key);
+
+struct rt_wqueue_node
+{
+	rt_thread_t polling_thread;
+	rt_list_t   list;
+
+	rt_wqueue_func_t wakeup;
+	rt_uint32_t key;
+};
+typedef struct rt_wqueue_node rt_wqueue_node_t;
+
+int __wqueue_default_wake(struct rt_wqueue_node *wait, void *key);
+
+void rt_wqueue_add(rt_wqueue_t *queue, struct rt_wqueue_node *node);
+void rt_wqueue_remove(struct rt_wqueue_node *node);
+int  rt_wqueue_wait(rt_wqueue_t *queue, int condition, int timeout);
+void rt_wqueue_wakeup(rt_wqueue_t *queue, void *key);
+
+#define DEFINE_WAIT_FUNC(name, function)                \
+    struct rt_wqueue_node name = {                      \
+        rt_current_thread,                              \
+        RT_LIST_OBJECT_INIT(((name).list)),             \
+                                                        \
+        function,                                       \
+        0                                               \
+    }
+
+#define DEFINE_WAIT(name) DEFINE_WAIT_FUNC(name, __wqueue_default_wake)
+
+#endif