[flashrom] [PATCH] AT49F020 support

[Andrew Morgan]

Hi,

Patch and test results for AT49F020 256KB parallel flash chip as found 
in a 56K modem. Read after erase was all 0xFF. Write and verify a random 
file worked. The datasheet says it is whole-chip-erase only. I haven't 
verified everything against the datasheet, but as my tests found that it 
works here's the patch.

Signed-off-by: Andrew Morgan