irqchip: renesas-intc-irqpin: Add helper variable dev = &pdev->dev

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lkml.kernel.org/r/1410527720-18061-2-git-send-email-geert+renesas@glider.be


Signed-off-by: Jason Cooper <jason@lakedaemon.net>