Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

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

arch/s390/include/asm/cio.h

@@ -183,7 +183,7 @@ struct esw3 {
  * The irb that is handed to the device driver when an interrupt occurs. For
  * solicited interrupts, the common I/O layer already performs checks whether
  * a field is valid; a field not being valid is always passed as %0.
- * If a unit check occured, @ecw may contain sense data; this is retrieved
+ * If a unit check occurred, @ecw may contain sense data; this is retrieved
  * by the common I/O layer itself if the device doesn't support concurrent
  * sense (so that the device driver never needs to perform basic sene itself).
  * For unsolicited interrupts, the irb is passed as-is (expect for sense data,