Merge tag 'mmc-9-6-2019' of https://gitlab.denx.de/u-boot/custodians/u-boot-mmc

Bug fixes to mmc_spi
Add Aspeed SD driver
Fix dw_mmc timeout calculation
Fix timeout values passed to mmc_wait_dat0
sdhci dt caps/mask update

[trini: Fix evb-ast2500_defconfig CONFIG_MMC line]
Signed-off-by: Tom Rini <trini@konsulko.com>