rpmsg_virtio: Move returned buffer kick to common location

After returning a buffer we kick the other side. This is done after both
call sites of the function that returns the buffer. Move this kick call
into that function to reduce code duplication and prevent it from not
being done after returning the buffer.

Signed-off-by: Andrew Davis <afd@ti.com>

lib/rpmsg/rpmsg_virtio.c

@@ -326,6 +326,8 @@ static bool rpmsg_virtio_release_rx_buffer_nolock(struct rpmsg_virtio_device *rv
 	/* Return buffer on virtqueue. */
 	len = virtqueue_get_buffer_length(rvdev->rvq, idx);
 	rpmsg_virtio_return_buffer(rvdev, rp_hdr, len, idx);
+	/* Tell peer we returned an rx buffer */
+	virtqueue_kick(rvdev->rvq);
 
 	return true;
 }
@@ -340,11 +342,8 @@ static void rpmsg_virtio_release_rx_buffer(struct rpmsg_device *rdev,
 	rp_hdr = RPMSG_LOCATE_HDR(rxbuf);
 
 	metal_mutex_acquire(&rdev->lock);
-	if (rpmsg_virtio_buf_held_dec_test(rp_hdr)) {
+	if (rpmsg_virtio_buf_held_dec_test(rp_hdr))
 		rpmsg_virtio_release_rx_buffer_nolock(rvdev, rp_hdr);
-		/* Tell peer we return some rx buffers */
-		virtqueue_kick(rvdev->rvq);
-	}
 	metal_mutex_release(&rdev->lock);
 }
 
@@ -608,10 +607,6 @@ static void rpmsg_virtio_rx_callback(struct virtqueue *vq)
 			rpmsg_virtio_release_rx_buffer_nolock(rvdev, rp_hdr);
 
 		rp_hdr = rpmsg_virtio_get_rx_buffer(rvdev, &len, &idx);
-		if (!rp_hdr) {
-			/* tell peer we return some rx buffer */
-			virtqueue_kick(rvdev->rvq);
-		}
 		metal_mutex_release(&rdev->lock);
 	}
 }