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The rtl818x driver uses programmed I/O but has a fallback to memory-mapped I/O registers. The fallback currently will not work since the registers are accessed using inl()/outl() programmed I/O functions in the driver. This patch removes the fallback to we fail cleanly when programmed I/O is not possible. Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> Signed-off-by: Joshua Oreman <oremanj@rwcr.net> Signed-off-by: Marty Connor <mdc@etherboot.org>