gpio: davinci: use value returning setters

struct gpio_chip now has additional variants of the set(_multiple)
driver callbacks that return an integer to indicate success or failure.
Convert the driver to using them.

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

drivers/gpio/gpio-davinci.c

···
 /*
  * Assuming the pin is muxed as a gpio output, set its output value.
  */
-static void
+static int
 davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 {
 	struct davinci_gpio_controller *d = gpiochip_get_data(chip);
···
 
 	writel_relaxed(__gpio_mask(offset),
 		       value ? &g->set_data : &g->clr_data);
+
+	return 0;
 }
 
 static int davinci_gpio_probe(struct platform_device *pdev)
···
 	chips->chip.direction_input = davinci_direction_in;
 	chips->chip.get = davinci_gpio_get;
 	chips->chip.direction_output = davinci_direction_out;
-	chips->chip.set = davinci_gpio_set;
+	chips->chip.set_rv = davinci_gpio_set;
 
 	chips->chip.ngpio = ngpio;
 	chips->chip.base = -1;