ANDROID: rockpi4: Support loading u-boot.itb from eMMC

Upstream u-boot will only load the u-boot.itb from mmc1 (sdmmc), it will
not load it from eMMC (sdhci), even if the TPL and SPL came from eMMC.

This change causes eMMC to be used as a fallback which allows the same
u-boot binary to used on SD-Card and eMMC.

Change-Id: I942cbc36b146956c1b0ba68eeb7cd748572969b5
Signed-off-by: Alistair Delva <adelva@google.com>
1 file changed