19943: cpu/stm32: FMC used for low-level LCD parallel interface r=maribu a=gschorcht
### Contribution description
This PR provides the implementation of the LCD low-level MCU 8080 parallel interface using the FMC peripheral.
### Testing procedure
```
BOARD=stm32f723e-disco make -C tests/drivers/st77xx flash
```
and
```
BOARD=stm32l496g-disco make -C tests/drivers/st77xx flash
```
should work on top of PR #19941. Drawing operations should be much faster.
### Issues/PRs references
Depends on PR #19941
19978: treewide: fix typos to make codespell happy r=maribu a=maribu
### Contribution description
- fixes typos in comments and docs (no generated firmware changes expected)
- fixes a typo in a string in a GUI of a utility program
- add some false positives to the ignore list
### Testing procedure
- No generated binaries (except for the GUI version of the utility program to flash the MSB-A2) should change
- The diff should not look too scary
### Issues/PRs references
None
Co-authored-by: Gunar Schorcht <gunar@schorcht.net>
Co-authored-by: Marian Buschsieweke <marian.buschsieweke@posteo.net>
554efb7040