[flashrom] [PATCH] Add mainboards to print.c and mark writing as tested on Winbond W25x80

[Yul Rottmann]

Hello List, 
I successfully tested flashrom on my MSI MS-7596 (785GM-E51). Here is
the patch to add it to the list of supported mainboards. Also I marked
writing as tested on the flashchip that belongs to it.

Earlier I reported the success of flashing my GIGABYTE GA-MA78G-DS3H.
This patch makes clear that it is about the revision 1.0.

I also tested flashing an ASRock 890GX Extreme3, which worked. I also
added it to print.c.

If you have questions, please contact me on my private e-mail adress
since I haven't subscribed to the mailinglist. 
Thanks!

Signed-off-by: Yul Rottmann