[PATCH] serial: pxa: brief description

[Marcus Folkesson]

I had a problem with a pxa270-based custom board when using the UART on
high speed (921.6 kbit/s).
The symptom was that the whole system just hangs sporadically.

After this work around was implemented the system seems to behave good.

In fact, I don't really see why the system should hang since there is a 
max counter, so the loop cannot run forever.

The patch is tested on kernel version 2.6.32, but the driver is allmost
the same.

Please take a look.
Feedback is very much appreciated

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