Patch: Fix for wrong logic in tx_empty for serial/amba-pl011.c

[Simon Budig]

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Hi all.

There is a problem with the logic of tx_empty in the amba-pl011 serial
port driver. Instead of checking for an empty FIFO it checks for a
not-full FIFO.

Attached is a patch that fixes this.

Bye,
        Simon Budig

- -- 
       Simon Budig                        kernel concepts GbR
       simon.budig at kernelconcepts.de      Sieghuetter Hauptweg 48
       +49-271-771091-17                  D-57072 Siegen
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