m68k: math-emu: Fix typos in comments

Various spelling mistakes in comments.
Detected with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Link: https://lore.kernel.org/r/20220430191122.8667-7-Julia.Lawall@inria.fr


Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>