Add DDR4 init codes, u-boot dtb and defconfig to support DDR4 EVK. The DDR4 EVK removed eMMC and Flexspi, but use NAND instead. Current codes support to boot from SD and enable NAND access in regular u-boot.
Signed-off-by: Ye Li Acked-by: Peng Fan
if TARGET_IMX8MM_EVK || TARGET_IMX8MM_DDR4_EVK config SYS_BOARD default "imx8mm_evk" config SYS_VENDOR default "freescale" config SYS_CONFIG_NAME default "imx8mm_evk" source "board/freescale/common/Kconfig" endif
