pinctrl: exynos: remove duplicate calls in irq handler

Because chained_irq_enter() has already called chip->irq_mask() and
chip->irq_ack(), also chained_irq_exit() will call chip->irq_unmask(),
so it's not necessary to call chip->irq_*() here.

Signed-off-by: Perr Zhang <strongbox8@zoho.com>
Acked-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
[Hand-edited from whitespace damaged patch]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/samsung/pinctrl-exynos.c

@@ -428,14 +428,10 @@ static void exynos_irq_eint0_15(struct irq_desc *desc)
 	int eint_irq;
 
 	chained_irq_enter(chip, desc);
-	chip->irq_mask(&desc->irq_data);
-
-	if (chip->irq_ack)
-		chip->irq_ack(&desc->irq_data);
 
 	eint_irq = irq_linear_revmap(bank->irq_domain, eintd->irq);
 	generic_handle_irq(eint_irq);
-	chip->irq_unmask(&desc->irq_data);
+
 	chained_irq_exit(chip, desc);
 }