media: vimc: Fix error return code in vimc_register_devices()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: f13d5f36 ("media: vimc: Collapse component structure into a single monolithic driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vimc/vimc-core.c

@@ -202,8 +202,10 @@ static int vimc_register_devices(struct vimc_device *vimc)
 	vimc->ent_devs = kmalloc_array(vimc->pipe_cfg->num_ents,
 				       sizeof(*vimc->ent_devs),
 				       GFP_KERNEL);
-	if (!vimc->ent_devs)
+	if (!vimc->ent_devs) {
+		ret = -ENOMEM;
 		goto err_v4l2_unregister;
+	}
 
 	/* Invoke entity config hooks to initialize and register subdevs */
 	ret = vimc_add_subdevs(vimc);