GPIO: omap_gpio: Fix gpio name names with device tree

The GPIO bank numbers do not appear in the device tree, so this
patch makes the gpio name based on the address
(ie gpio@49054000_31 vs gpio4_31)

adam

Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Derald D. Woods <woods.technical@gmail.com>

drivers/gpio/omap_gpio.c

@@ -288,11 +288,9 @@ static int omap_gpio_probe(struct udevice *dev)
 	struct gpio_bank *bank = dev_get_priv(dev);
 	struct omap_gpio_platdata *plat = dev_get_platdata(dev);
 	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
-	int banknum;
 	char name[18], *str;
 
-	banknum = plat->bank_index;
-	sprintf(name, "GPIO%d_", banknum + 1);
+	sprintf(name, "gpio@%4x_", (unsigned int)plat->base);
 	str = strdup(name);
 	if (!str)
 		return -ENOMEM;