The boards supported by this driver have an eeprom attached to a S5920
PCI controller chip. Knowing this information allows simplifying the
code that reads the PCI bars to get the iobase address.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>