d/p/bsh-imx8mn-smm-s2pro: Support environment stored in eMMC
Task https://phabricator.apertis.org/T8220
BSH SMM-S2 PRO boards come with an eMMC memory. Let's enable support to store the u-boot environment in it.
Task https://phabricator.apertis.org/T8220
BSH SMM-S2 PRO boards come with an eMMC memory. Let's enable support to store the u-boot environment in it.