dt-bindings: mmc: sdhci-of-dwcmhsc: Add reset support

Properly describe reset related properties in the binding.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221107173310.60503-1-sebastian.reichel@collabora.com


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