Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

sound/isa/sb/emu8000.c

@@ -370,7 +370,7 @@ init_arrays(struct snd_emu8000 *emu)
 
 /*
  * Size the onboard memory.
- * This is written so as not to need arbitary delays after the write. It
+ * This is written so as not to need arbitrary delays after the write. It
  * seems that the only way to do this is to use the one channel and keep
  * reallocating between read and write.
  */