Fix smatch error:

media-git/drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c:100 
mtk_mdp_vpu_send_msg() error: double unlock 'mutex:&ctx->mdp_dev->vpulock'

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c 
b/drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c
index 39188e5..4893825 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_vpu.c
@@ -92,11 +92,9 @@ static int mtk_mdp_vpu_send_msg(void *msg, int len, struct 
mtk_mdp_vpu *vpu,

        mutex_lock(&ctx->mdp_dev->vpulock);
        err = vpu_ipi_send(vpu->pdev, (enum ipi_id)id, msg, len);
-       if (err) {
-               mutex_unlock(&ctx->mdp_dev->vpulock);
+       if (err)
                dev_err(&ctx->mdp_dev->pdev->dev,
                        "vpu_ipi_send fail status %d\n", err);
-       }
        mutex_unlock(&ctx->mdp_dev->vpulock);

        return err;

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