pinctrl: renesas: rza1: Mark GPIOs as used

GPIOs showed up as unclaimed, so they could be muxed to something else
even though they were in use. Mark GPIOs as claimed to avoid that.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20240930191523.7030-2-wsa+renesas@sang-engineering.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>