Add Support for Macronix MX29LV800CT

[Starfoxfs]

Hi,

it would be very nice if you can add support for the Macronix MX29LV800CT.

Datasheets here:
https://www.mxic.com.tw/Lists/Datasheet/Attachments/8544/MX29LV800C%20T-B,%203V,%208Mb,%20v2.6.pdf

Another Flashrom Version from jhcloos has this Chipset in the flashchips.h File:
https://github.com/jhcloos/flashrom/blob/master/flashchips.h

Big Thanks in advance

[github-actions]

Thank you for your contribution. The flashrom project does not handle GitHub issues or pull requests, since this repository on GitHub is just a mirror of our actual repository. Thus, we would like to encourage you to have a look at on our development guide and submit your patch to review.coreboot.org. Issues are handled over our ticket system. If you have questions, feel free to reach out to us. There are multiple ways to contact us.