gpio: ftgpio010: use device name for gpiochip name & label

Currently, we use just the fixed string "FTGPIO010" as the gpiochip name
for ftgpio010 drivers. Because it's fixed, this means we cannot
distinguish multiple ftgpio010 devices present on a single system.

This change uses the dev_name() instead, which should be unique between
multiple instances.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-ftgpio010.c

@@ -277,7 +277,7 @@ static int ftgpio_gpio_probe(struct platform_device *pdev)
 		dev_err(dev, "unable to init generic GPIO\n");
 		goto dis_clk;
 	}
-	g->gc.label = "FTGPIO010";
+	g->gc.label = dev_name(dev);
 	g->gc.base = -1;
 	g->gc.parent = dev;
 	g->gc.owner = THIS_MODULE;