Correct the misspelled textual name of the SD0H clock.

Fixes: 470e3f0d ("clk: renesas: rcar-gen4: Introduce R-Car Gen4 CPG driver")
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20221012184830.3199-1-wsa+renesas@sang-engineering.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>