avr32: re-instate MCI WP/CD pin assignments for ATNGW100

The MRMT1 patch mistakenly reverted commit
fe272b5b.

This new patch is intended to correct this, so that both daughtercards
should be able to assign GPIO PC25 and PE0 to the MCI driver.

Signed-off-by: Peter Ma <pma@mediamatech.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>