arm: socfpga: Enable saveenv for SD/MMC

Enable the able to save the environment variables when SD/MMC is used.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>

Merge git://git.denx.de/u-boot-socfpga

arm: socfpga: Add support for DENX MCV SoM and MCVEVK board

Add support for DENX MCV SoM, which is CycloneV based and the
associated DENX MCVEVK baseboard. The board can boot from eMMC.
Ethernet and

arm: socfpga: Add support for DENX MCV SoM and MCVEVK board

Add support for DENX MCV SoM, which is CycloneV based and the
associated DENX MCVEVK baseboard. The board can boot from eMMC.
Ethernet and USB is supported.

Signed-off-by: Marek Vasut <marex@denx.de>

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