arm64: dts: renesas: ulcb-kf: fix wrong comment

Fix comment referencing salvator board, likely a copy-paste leftover.

ulcb-kf.dtsi has nothing to do with salvator.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Fixes: 80c07701 ("arm64: dts: renesas: ulcb-kf: add pcm3168 sound codec")
Link: https://lore.kernel.org/r/20220216181003.114049-1-nikita.yoush@cogentembedded.com


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