[media] mem2mem_testdev: Remove unneeded struct vb2_queue clear on queue_init()

queue_init() is always called by v4l2_m2m_ctx_init(), which allocates
a context struct v4l2_m2m_ctx with kzalloc.
Therefore, there is no need to clear vb2_queue src/dst structs.
Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/mem2mem_testdev.c

@@ -838,7 +838,6 @@ static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *ds
 	struct m2mtest_ctx *ctx = priv;
 	int ret;
 
-	memset(src_vq, 0, sizeof(*src_vq));
 	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 	src_vq->io_modes = VB2_MMAP;
 	src_vq->drv_priv = ctx;
@@ -850,7 +849,6 @@ static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *ds
 	if (ret)
 		return ret;
 
-	memset(dst_vq, 0, sizeof(*dst_vq));
 	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	dst_vq->io_modes = VB2_MMAP;
 	dst_vq->drv_priv = ctx;