NAND simulator

[Artem B. Bityutskiy]

Hello,

I'm going to rework NAND simulator (nandsim, drivers/mtd/nand/nandsim.c) 
to add the following functionality:

1. Emulation of devices larger then 128MB
2. Possibility to manually specify any page size/eraseblock size/flash size.

I am going to remove flash delays emulation as it appears to be 
unusable. No objections?

If there are some additional offers, please, provide.

-- 
Best Regards,
Artem B. Bityutskiy,
St.-Petersburg, Russia.