[patch] drm/panel: s6e8aa0: silence array overflow warning

[Dan Carpenter]

Smatch complains that we are reading beyond the end of the array here:

        drivers/gpu/drm/panel/panel-s6e8aa0.c:852 s6e8aa0_read_mtp_id()
        warn: buffer overflow 's6e8aa0_variants' 4 <= 4

We set the error code, so it's not harmful but it looks like a return
was intended here so lets add that and silence the warning.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
Compile tested only.

diff --git a/drivers/gpu/drm/panel/panel-s6e8aa0.c 
b/drivers/gpu/drm/panel/panel-s6e8aa0.c
index 35941d2..06e57a2 100644
--- a/drivers/gpu/drm/panel/panel-s6e8aa0.c
+++ b/drivers/gpu/drm/panel/panel-s6e8aa0.c
@@ -847,6 +847,7 @@ static void s6e8aa0_read_mtp_id(struct s6e8aa0 *ctx)
        if (i >= ARRAY_SIZE(s6e8aa0_variants)) {
                dev_err(ctx->dev, "unsupported display version %d\n", id[1]);
                ctx->error = -EINVAL;
+               return;
        }

        ctx->variant = &s6e8aa0_variants[i];