[U-Boot] NS16550 Register structure

[Detlev Zundel]

Hi Hemant,

> Only 32-bit access is supported for UART MMRs on DM6467 and hence need
> to use STR/LDR instead of STRB/LDRB.

Argh.  Why do hw people always think software can fix anything?  So out
of interest - do you get a bus fault or what?  Maybe we can fixup such
non-aligned accesses outside of the serial driver?

I'm really reluctant to topple over an infratstructure working on _many_
differenty hardware architectures and platforms only for one special
case which may be considered to be buggy hardware...

Cheers
  Detlev

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