[flashrom] [PATCH] Convert flashchips to use struct eraseblock - AMD

[Sean Nelson]

After asking if page_size was equivalent to a chip's sector size, while 
I was verifying datasheets and our flashchip support table, Carl-Daniel 
suggested I convert all chips to use struct eraseblock. Starting from 
the top of the file and working down, this is the first of many patches.

Signed-off-by: Sean Nelson