Fix erase blocks for Winbond W25X{10,20,40,80} SPI chips

The Winbond W25X10 and related chips only have 4k and 64k blocks and
only accept erase commands: 20h, d8h, and c7h.

Corresponding to flashrom svn r897.

Signed-off-by: Sean Nelson <audiohacked@gmail.com>
Acked-by: David Hendricks <dhendrix@google.com>
1 file changed