[PATCH] virtio_ring: kernel-doc: fix function name, function param warnings

[Randy Dunlap]

Add description for the function parameter @vaddr.
Correct the function name in a kernel-doc comment.

Fixes these warning:
WARNING: drivers/virtio/virtio_ring.c:3174 function parameter 'vaddr' not
 described in 'virtqueue_map_free_coherent'
WARNING: drivers/virtio/virtio_ring.c:3308 expecting prototype for
 virtqueue_mapping_error(). Prototype was for virtqueue_map_mapping_error()
 instead

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
---
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Cc: Eugenio Pérez <eperezma@xxxxxxxxxx>
Cc: virtualization@xxxxxxxxxxxxxxx
---
 drivers/virtio/virtio_ring.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-next-20251114.orig/drivers/virtio/virtio_ring.c
+++ linux-next-20251114/drivers/virtio/virtio_ring.c
@@ -3166,6 +3166,7 @@ EXPORT_SYMBOL_GPL(virtqueue_map_alloc_co
  * @vdev: the virtio device we are talking to
  * @map: metadata for performing mapping
  * @size: the size of the buffer
+ * @vaddr: virtual address of the buffer
  * @map_handle: the mapped address that needs to be freed
  *
  */
@@ -3299,7 +3300,7 @@ void virtqueue_unmap_single_attrs(const
 EXPORT_SYMBOL_GPL(virtqueue_unmap_single_attrs);
 
 /**
- * virtqueue_mapping_error - check dma address
+ * virtqueue_map_mapping_error - check dma address
  * @_vq: the struct virtqueue we're talking about.
  * @addr: DMA address
  *