pinctrl: renesas: r8a779h0: Remove unneeded separators

Usually there are no separators between alternate functions.
Remove them to increase uniformity.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/1fcd4f8734d063c9a691d9ab8ca0543892eb8388.1718378979.git.geert+renesas@glider.be