Add the NAND_SCAN_SILENT_NODEV to the optional NAND devices that may not
be fitted to the board
Signed-off-by: NBen Dooks <ben@simtec.co.uk>
Signed-off-by: NSimtec Linux Team <linux@simtec.co.uk>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>