irqchip/renesas-intc-irqpin: Restore devm_ioremap() alignment

Restore alignment of the continuation of the devm_ioremap() call in
intc_irqpin_probe().

Fixes: 4bdc0d67 ("remove ioremap_nocache and devm_ioremap_nocache")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200212084744.9376-1-geert+renesas@glider.be