Support baud rate tables in the serial API
This is in service of removing CFG_SYS_BAUDRATE_TABLE
Pali originally sent this series:
https://patchwork.ozlabs.org/project/uboot/list/?series=262148&state=*
The discussion here provided a suitable approach
http://patchwork.ozlabs.org/project/uboot/patch/20210925121958.26001-1-pali@kernel.org/
This should be rebased and another driver added, e.g. ns16550 and sandbox
Edited by Simon Glass