gpio/davinci: add interrupt support for GPIOs 16-31

Interrupts for GPIOs 16 through 31 are enabled by bit 1 in the
"binten" register (offset 8). Previous versions of GPIO only
used bit 0, which enables GPIO 0-15 interrupts.
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-davinci.c

@@ -545,7 +545,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 		chips[0].chip.to_irq = gpio_to_irq_unbanked;
 		chips[0].gpio_irq = bank_irq;
 		chips[0].gpio_unbanked = pdata->gpio_unbanked;
-		binten = BIT(0);
+		binten = GENMASK(pdata->gpio_unbanked / 16, 0);
 
 		/* AINTC handles mask/unmask; GPIO handles triggering */
 		irq = bank_irq;