Add queue prototype

Author: Cuda-Chen

virtio-snd.c

@@ -8,6 +8,7 @@
 #include "CNFA_sf.h"
 
 #include "device.h"
+#include "queue.h"
 #include "riscv.h"
 #include "riscv_private.h"
 #include "virtio.h"
@@ -663,6 +664,11 @@ static int virtio_snd_desc_handler(virtio_snd_state_t *vsnd,
     return 0;
 }
 
+
+typedef struct {
+    struct virtq_desc;
+    struct queue_head q;
+} virtq_desc_queue_t;
 static int virtio_snd_tx_desc_handler(virtio_snd_state_t *vsnd,
                                       const virtio_snd_queue_t *queue,
                                       uint32_t desc_idx,