gpio: tps65910: initialize of_node of gpio_chip

Initialize the gpio chip's of_node to the device's node
to work with DT based system.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-tps65910.c

@@ -149,6 +149,7 @@ static int __devinit tps65910_gpio_probe(struct platform_device *pdev)
 	tps65910_gpio->gpio_chip.set	= tps65910_gpio_set;
 	tps65910_gpio->gpio_chip.get	= tps65910_gpio_get;
 	tps65910_gpio->gpio_chip.dev = &pdev->dev;
+	tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node;
 	if (pdata && pdata->gpio_base)
 		tps65910_gpio->gpio_chip.base = pdata->gpio_base;
 	else