Add default configuration for NAND, to be enabled in your board config. Ensure
clock gating is set appropriately when the NAND is enabled.
Acked-by: NJason Cooper <jason@lakedaemon.net>
Signed-off-by: NJamie Lentin <jm@lentin.co.uk>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>