[flashrom] [PATCH] Add en29lv640b

[Rudolf Marek]

Hi

Following patch adds the en29lv640b which needs special command sequences in 8 
bit mode. Also, 8 bit programming needs actually 16bit double byte program.

The chip is found on bifferboard.

Please check the patch and let me know.

Signed-off-by: Rudolf Marek

Thanks
Rudolf