pinctrl: renesas: Reformat macros defining struct initializers

Reformat all macros that define structure initializers, to visually
resemble structure definitions:
  - Move the opening curly brace to the previous line,
  - Move the closing curly brace to the first position,
  - Reduce indentation of the block to a single TAB, decreasing the need
    for line breaks,
  - Align backslashes for line continuation to the last TAB block where
    possible,

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/03a1eed3c4f57d7b14ef53ab49e04de10d0e383c.1640269757.git.geert+renesas@glider.be