mmc: sdhci-esdhc-imx: Add an new esdhc_soc_data for i.MX8MM

Add new esdhc_soc_data, with compatible string "fsl,imx8mm-usdhc".

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1582100757-20683-5-git-send-email-haibo.chen@nxp.com


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