erasing MX25L12873F

[Luiz Felipe]

Hello,

Firstly, thanks for the program.
I followed the following thread and got the same results when trying to
write, I can find the chip, it respond to commands, but fail to erase.

https://mail.coreboot.org/pipermail/flashrom/2018-January/015330.htm

What I have tried is powering the chip from motherboard and the PI from it
to avoid ground loops.