ath25: 4.9: fix GPIO compile issues

Consider renaming the dev field to parent in the upstream.

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>

target/linux/ath25/patches-4.9/107-ar5312_gpio.patch

@@ -177,7 +177,7 @@
 +	if (IS_ERR(ar5312_mem))
 +		return PTR_ERR(ar5312_mem);
 +
-+	ar5312_gpio_chip.dev = dev;
++	ar5312_gpio_chip.parent = dev;
 +	ret = gpiochip_add(&ar5312_gpio_chip);
 +	if (ret) {
 +		dev_err(dev, "failed to add gpiochip\n");

target/linux/ath25/patches-4.9/108-ar2315_gpio.patch

@@ -310,7 +310,7 @@
 +	if (IS_ERR(ar2315_mem))
 +		return PTR_ERR(ar2315_mem);
 +
-+	ar2315_gpio_chip.dev = dev;
++	ar2315_gpio_chip.parent = dev;
 +	ret = gpiochip_add(&ar2315_gpio_chip);
 +	if (ret) {
 +		dev_err(dev, "failed to add gpiochip\n");