Only touch the PCR register in order to set bits for the fxp driver. The 3C509-TX card apparently had a slightly different version of the chip, and has problems when this register is set.  The problem does not appear on the 3C509{BC} cards, but since only the fxp driver needs specific bits set, conditionalize on that.
Only touch the PCR register in order to set bits for the fxp driver.
The 3C509-TX card apparently had a slightly different version of the
chip, and has problems when this register is set.  The problem does
not appear on the 3C509{BC} cards, but since only the fxp driver needs
specific bits set, conditionalize on that.

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