gpio: loongson-64bit: Fix incorrect NULL check after devm_kcalloc()

Fix incorrect NULL check in loongson_gpio_init_irqchip().
The function checks chip->parent instead of chip->irq.parents.

Fixes: 03c146c ("gpio: loongson-64bit: Add support for Loongson-2K0300 SoC")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Link: https://patch.msgid.link/20260205072649.3271158-1-nichen@iscas.ac.cn
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: Chen Ni

drivers/gpio/gpio-loongson-64bit.c

@@ -263,7 +263,7 @@ static int loongson_gpio_init_irqchip(struct platform_device *pdev,
 	chip->irq.num_parents = data->intr_num;
 	chip->irq.parents = devm_kcalloc(&pdev->dev, data->intr_num,
 					 sizeof(*chip->irq.parents), GFP_KERNEL);
-	if (!chip->parent)
+	if (!chip->irq.parents)
 		return -ENOMEM;
 
 	for (i = 0; i < data->intr_num; i++) {