Merge tag 'mmc-2021-4-6' of https://source.denx.de/u-boot/custodians/u-boot-mmc

Update hwpartition usage
Check bootbus's arguments
workaround for erratum A-011334 for fsl_esdhc driver
add pulse width detection workaround for fsl_esdhc driver
Use alias num before checking mmc index when creating device