mmc: renesas_sdhi: disable clocks if registering regulator failed

Because the clocks were just enabled, bail out to the proper target if
there are problems with the regulator.

Fixes: fae80a99 ("mmc: renesas_sdhi: Add support for RZ/G3E SoC")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20250330221732.56072-2-wsa+renesas@sang-engineering.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>