arm: mvebu: spl: Load proper U-Boot from selected eMMC boot partition

When eMMC boot is selected then BootROM loads kwbimage header (U-Boot SPL)
from the selected eMMC boot partition. So for eMMC boot ensure that U-Boot
SPL loads U-Boot proper (from kwbimage) also from the same selected eMMC
boot partition.

Fixes: 2226ca173486 ("arm: mvebu: Load U-Boot proper binary in SPL code based on kwbimage header")
Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 16c5e72..14558bb 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -348,6 +348,7 @@
 	imply SPL_GPIO
 	imply SPL_LIBDISK_SUPPORT
 	imply SPL_MMC
+	select SUPPORT_EMMC_BOOT if SPL_MMC
 	select SPL_BOOTROM_SUPPORT
 
 config MVEBU_SPL_BOOT_DEVICE_SATA