mmc: tmio: Use MMC core APIs to control the vqmmc regulator

mmc: tmio: Use MMC core APIs to control the vqmmc regulator

Use the mmc_regulator_enable_vqmmc() and mmc_regulator_disable_vqmmc() APIs
to enable/disable the vqmmc regulator.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> # on RZ/G3S
Link: https://lore.kernel.org/r/20240724182119.652080-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>