gpio: Rename free() to rfree()

This function name conflicts with our desire to #define free() to
something else on sandbox. Since it deals with resources, rename it to
rfree().

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 594e0a4..a8c5b7f 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -128,7 +128,7 @@
 
 static const struct dm_gpio_ops rcar_gpio_ops = {
 	.request		= rcar_gpio_request,
-	.free			= rcar_gpio_free,
+	.rfree			= rcar_gpio_free,
 	.direction_input	= rcar_gpio_direction_input,
 	.direction_output	= rcar_gpio_direction_output,
 	.get_value		= rcar_gpio_get_value,
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 90fbed4..0a22441 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -364,8 +364,8 @@
 	uc_priv = dev_get_uclass_priv(dev);
 	if (!uc_priv->name[offset])
 		return -ENXIO;
-	if (gpio_get_ops(dev)->free) {
-		ret = gpio_get_ops(dev)->free(dev, offset);
+	if (gpio_get_ops(dev)->rfree) {
+		ret = gpio_get_ops(dev)->rfree(dev, offset);
 		if (ret)
 			return ret;
 	}
@@ -1043,8 +1043,8 @@
 	if (!reloc_done) {
 		if (ops->request)
 			ops->request += gd->reloc_off;
-		if (ops->free)
-			ops->free += gd->reloc_off;
+		if (ops->rfree)
+			ops->rfree += gd->reloc_off;
 		if (ops->direction_input)
 			ops->direction_input += gd->reloc_off;
 		if (ops->direction_output)
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index d6cf187..05777e6 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -248,7 +248,7 @@
  */
 struct dm_gpio_ops {
 	int (*request)(struct udevice *dev, unsigned offset, const char *label);
-	int (*free)(struct udevice *dev, unsigned offset);
+	int (*rfree)(struct udevice *dev, unsigned int offset);
 	int (*direction_input)(struct udevice *dev, unsigned offset);
 	int (*direction_output)(struct udevice *dev, unsigned offset,
 				int value);