irqchip/renesas-rza1: Use semicolons instead of commas

This code works, but it is cleaner to use semicolons at the end of
statements instead of commas.

Extracted from a big anonymous patch by Julia Lawall
<julia.lawall@inria.fr>.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/b1710bb6ea5faa7a7fe74404adb0beb951e0bf8c.1631699160.git.geert+renesas@glider.be