ARM: dts: r8a7778: Enable IRLM setup via DT

Make use of the IRLM setup feature in the renesas-intc-irqpin driver.

Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Tested-by: Simon Horman <horms+renesas@verge.net.au>
Link: https://lore.kernel.org/r/1441726946-30131-3-git-send-email-ulrich.hecht+renesas@gmail.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>