[ Upstream commit2dd824cca3] The return type of irq_chip.irq_mask() and irq_chip.irq_unmask() should be void. Fixes:dbe776c2ca("gpio: uniphier: add UniPhier GPIO controller driver") Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Sasha Levin <sashal@kernel.org>