[PATCH] natsemi: Support oversized EEPROMs

The natsemi chip can have a larger EEPROM attached than it itself uses for
configuration.  This patch adds support for user space access to such an
EEPROM.

Signed-off-by: Mark Brown <broonie@sirena.org.uk>
Cc: Tim Hockin <thockin@hockin.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>