[PATCH] rockchip: rk3568: add support of all UART

[Arseniy Mescheryakov]

Hello, you are right, that this patch is not needed for working
console and with property configured dt and config it works. But for
debug (for example, everything that was printed by debug()) it is
needed. Withit this code you will not see this prints.
And yes, via DDR blob you can configure a specific uart and it debug()
will work, but I think u-boot shouldn't depend on some proprietary
blobs.