pinctrl: renesas: r8a779g0: 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/2375711d5edd03a209b4ed996f136e1f3c649773.1718378859.git.geert+renesas@glider.be