gpio: aspeed: remove duplicated statement

Remove duplicated assignment statement from aspeed_gpio_probe() function.
Signed-off-by: Tao Ren <taoren@fb.com>
Acked-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-aspeed.c

@@ -1185,7 +1185,6 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)
 
 	gpio->chip.parent = &pdev->dev;
 	gpio->chip.ngpio = gpio->config->nr_gpios;
-	gpio->chip.parent = &pdev->dev;
 	gpio->chip.direction_input = aspeed_gpio_dir_in;
 	gpio->chip.direction_output = aspeed_gpio_dir_out;
 	gpio->chip.get_direction = aspeed_gpio_get_direction;