driver:gpio remove all usage of gpio_remove retval in driver

this remove all reference to gpio_remove retval in all driver
except pinctrl and gpio. the same thing is done for gpio and
pinctrl in two different patches.

Signed-off-by: Abdoulaye Berthe <berthe.ab@gmail.com>
Acked-by: Michael Büsch <m@bues.ch>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c
index 11c19e5..4fac16b 100644
--- a/drivers/mfd/tc6393xb.c
+++ b/drivers/mfd/tc6393xb.c
@@ -607,7 +607,7 @@
 	struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
 	struct tc6393xb *tc6393xb;
 	struct resource *iomem, *rscr;
-	int ret, temp;
+	int ret;
 
 	iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	if (!iomem)
@@ -714,7 +714,7 @@
 
 err_gpio_add:
 	if (tc6393xb->gpio.base != -1)
-		temp = gpiochip_remove(&tc6393xb->gpio);
+		gpiochip_remove(&tc6393xb->gpio);
 	tcpd->disable(dev);
 err_enable:
 	clk_disable(tc6393xb->clk);
@@ -744,13 +744,8 @@
 
 	tc6393xb_detach_irq(dev);
 
-	if (tc6393xb->gpio.base != -1) {
-		ret = gpiochip_remove(&tc6393xb->gpio);
-		if (ret) {
-			dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
-			return ret;
-		}
-	}
+	if (tc6393xb->gpio.base != -1)
+		gpiochip_remove(&tc6393xb->gpio);
 
 	ret = tcpd->disable(dev);
 	clk_disable(tc6393xb->clk);