gpio: davinci: use generic device properties

OF-specific routines should not be used unless necessary. Generic device
properties are preferred so switch to using them in the driver code.

Reviewed-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bartosz Golaszewski <[e-mail]>

drivers/gpio/gpio-davinci.c

···
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/module.h>
-#include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
···
 	unsigned int ngpio, nbank, nirq, gpio_unbanked;
 	struct davinci_gpio_controller *chips;
 	struct device *dev = &pdev->dev;
-	struct device_node *dn = dev_of_node(dev);
 
 	/*
 	 * The gpio banks conceptually expose a segmented bitmap,
 	 * and "ngpio" is one more than the largest zero-based
 	 * bit index that's valid.
 	 */
-	ret = of_property_read_u32(dn, "ti,ngpio", &ngpio);
+	ret = device_property_read_u32(dev, "ti,ngpio", &ngpio);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to get the number of GPIOs\n");
 	if (ngpio == 0)
···
 	 * interrupts is equal to number of gpios else all are banked so
 	 * number of interrupts is equal to number of banks(each with 16 gpios)
 	 */
-	ret = of_property_read_u32(dn, "ti,davinci-gpio-unbanked",
-				   &gpio_unbanked);
+	ret = device_property_read_u32(dev, "ti,davinci-gpio-unbanked",
+				       &gpio_unbanked);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to get the unbanked GPIOs property\n");