mioa701: add newly available DoC G3 chip

As the mioa701 board has a M-Systems DiskOnChip G3 chip, add
it to the platform resources of the board.

Signed-off-by: Robert Jarzmik <robert.jarzmik@atosorigin.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>