Patch from Alessandro Zummo

The I2C pin assignment for the Iomega NAS100d board was incorrect.  This
patch fixes it.  The correct assignment has now been tested using the
new RTC class and a new driver for the RTC on the NAS100d.
Signed-off-by: NRod Whitby <rod@whitby.id.au>
Signed-off-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>