dt-bindings: mmc: Add support for rk3576 eMMC

dt-bindings: mmc: Add support for rk3576 eMMC

The device is compatible with rk3588, so add an entry for the 2
compatibles together.

The rk3576 device has a power-domain that needs to be on for the eMMC to
be used. Add it as a requirement.

Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240904203154.253655-2-detlev.casanova@collabora.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>