arm64: dts: renesas: Miscellaneous whitespace fixes

Make whitespace and indentation more consistent.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/3f2bcae1253c7a31d3eb6755185092a1f2b99b09.1642524439.git.geert+renesas@glider.be