gpio: mvebu_gpio: Set bank name to mvebu%d

Currently bank name is just one alphabetical letter.
Change it to mvebu and number.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/gpio/mvebu_gpio.c b/drivers/gpio/mvebu_gpio.c
index 55ed685..f706a6d 100644
--- a/drivers/gpio/mvebu_gpio.c
+++ b/drivers/gpio/mvebu_gpio.c
@@ -23,7 +23,7 @@
 
 struct mvebu_gpio_priv {
 	struct mvebu_gpio_regs *regs;
-	char name[2];
+	char name[sizeof("mvebuX_")];
 };
 
 static int mvebu_gpio_direction_input(struct udevice *dev, unsigned int gpio)
@@ -93,7 +93,7 @@
 
 	priv->regs = dev_read_addr_ptr(dev);
 	uc_priv->gpio_count = dev_read_u32_default(dev, "ngpios", MVEBU_GPIOS_PER_BANK);
-	priv->name[0] = 'A' + dev_seq(dev);
+	sprintf(priv->name, "mvebu%d_", dev_seq(dev));
 	uc_priv->bank_name = priv->name;
 
 	return 0;