This reverts commit cf01c743a89e17d78037fcc77f32b8daa859845e. Adding an unexplained delay seemed wrong in the first place, but it fixed the display on the MCB2388. Turns out the display was erroneously operating in 8-bit mode due to the uninitialized flag register. Why the delay helped here I don't know. But with #12634 fixing this, this hack is not needed anymore.