clk: renesas: rzg2l: Fix typo in function name

Fix typo, rzg2l_mod_clock__get_sibling -> rzg2l_mod_clock_get_sibling

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220921080051.5604-1-prabhakar.mahadev-lad.rj@bp.renesas.com


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