siflower: add ngpios property to gpio-siflower

The same GPIO controller is found on all current Siflower SoCs,
with different number of GPIOs. Add ngpios property instead of
specifying it with dt match data.

Link: https://github.com/openwrt/openwrt/pull/17115
Signed-off-by: Chuanhong Guo <[email protected]>

target/linux/siflower/dts/sf19a2890.dtsi

@@ -232,6 +232,7 @@
 
 			gpio-controller;
 			#gpio-cells = <2>;
+			ngpios = <49>;
 			gpio-ranges = <&pinctrl 0 0 49>;
 
 			interrupt-controller;

target/linux/siflower/files-6.6/drivers/gpio/gpio-siflower.c

@@ -255,7 +255,10 @@ static int sf_gpio_probe(struct platform_device *pdev)
 	u32 ngpios, ngroups;
 	int ret, i;
 
-	ngpios = (unsigned int) device_get_match_data(dev);
+	ret = of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios);
+	if (ret)
+		return ret;
+
 	ngroups = DIV_ROUND_UP(ngpios, GPIOS_PER_GROUP);
 	priv = devm_kzalloc(dev, struct_size(priv, irq, ngroups), GFP_KERNEL);
 	if (!priv)
@@ -323,7 +326,7 @@ static int sf_gpio_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id sf_gpio_ids[] = {
-	{ .compatible = "siflower,sf19a2890-gpio", .data = (void *)49 },
+	{ .compatible = "siflower,sf19a2890-gpio" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, sf_gpio_ids);