tianocore is a liability for the libreboot project. it's a bloated mess, and
unreliable, broken on many boards, and basically impossible to audit.

i don't trust tianocore, so i'm removing it.

you must de-solder the default chip and install the new one.
winbond w25q128fvsig is a nice choice of 16MB (128Mbit) IC

4mb and 8mb users can just pad their roms to 16mb, using the instructions on
<https://libreboot.org/faq.html#how-do-i-pad-a-rom-before-flashing>

maintaining them in lbmk is a waste of time, and also a hazard because it's a
lot of duplicated labour when making any changes, which could result in awful
mistakes being made

See:
<https://lists.nongnu.org/archive/html/libreboot/2016-08/msg00063.html>

This enables all SATA ports, allowing full T400s compatibility. T400s already
works just fine, when flashing a T400 ROM, but not all SATA ports were usable.

The specific patch is here:
<https://lists.nongnu.org/archive/html/libreboot/2016-08/txtgT_L8DC94R.txt>

There was also this patch, which coreboot actually adapted upstream:
<https://lists.nongnu.org/archive/html/libreboot/2016-08/txtMXyws85Q_P.txt>

Yes, this patch was submitted in 2016. I overlooked it, during all this time.

mitigate missing characters in unifont for border/arrow characters. this saves
space because now it is no longer necessary to add a custom font

the background added has the libreboot logo on it, and it's 10kb in size unlike
the old gnulove background that was hundreds of KB