dt-bindings: mmc: fsl-imx-esdhc: add NXP S32G2 support

Add support for the SDHC binding of S32G2.

Signed-off-by: Chester Lin <clin@suse.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Link: https://lore.kernel.org/r/20211021071333.32485-2-clin@suse.com


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