extcon: realtek: fix NULL deref check in extcon_rtk_type_c_probe

In extcon_rtk_type_c_probe() devm_kzalloc() may return NULL but this
returned value is not checked.

Fixes: 8a590d7 ("extcon: add Realtek DHC RTD SoC Type-C driver")
Link: https://lore.kernel.org/lkml/20241025094650.253599-1-hanchunchao@inspur.com/
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Author: Charles Han

drivers/extcon/extcon-rtk-type-c.c

@@ -1369,6 +1369,8 @@ static int extcon_rtk_type_c_probe(struct platform_device *pdev)
 	}
 
 	type_c->type_c_cfg = devm_kzalloc(dev, sizeof(*type_c_cfg), GFP_KERNEL);
+	if (!type_c->type_c_cfg)
+		return -ENOMEM;
 
 	memcpy(type_c->type_c_cfg, type_c_cfg, sizeof(*type_c_cfg));