gpio: davinci: Assign first bank regs for unbanked case

As per the re-design assign the first bank regs for unbanked
irq case. This was missed out in the original patch.
Signed-off-by: NKeerthy <j-keerthy@ti.com>
Fixes: b5cf3fd8 ("gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip")
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-davinci.c

@@ -383,7 +383,7 @@ static int gpio_irq_type_unbanked(struct irq_data *data, unsigned trigger)
 	u32 mask;
 
 	d = (struct davinci_gpio_controller *)irq_data_get_irq_handler_data(data);
-	g = (struct davinci_gpio_regs __iomem *)d->regs;
+	g = (struct davinci_gpio_regs __iomem *)d->regs[0];
 	mask = __gpio_mask(data->irq - d->base_irq);
 
 	if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))