fix vectorio rotation issue

[FoamyGuy]

Resolves: #8742

When the mirrored axis are applied we need to subtract one so that pixel index 0 becomes index 319 on a display that has width of 320px without this we attempt to use index 320 which is out of the display bounds and ignored.

Testing on a pyportal with the tft reproducer from the issue now correctly shows the green outline around all 4 sides of the display in all 4 rotations.

[FoamyGuy]

This was a relatively small change, but it still overflowed a few of the tightest builds. I thought I could shave a little bit of space by removing a duplicated debug message, but that doesn't save anything because of the way they're set to void by default anyhow.

I opted to disable vectorio for the two m4 express boards without built-in displays and disabled flopyio for the openbook_m4, the others had already disabled it and this one has a built-in eink display so vectorio is a bit more practical to use on the hardware. I'm open to other suggestions for getting it to fit.

[tannewt]

Thank you! Good work debugging this!