Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index 2026f9e..621dfa1 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -237,7 +237,7 @@
 					* enabling interrupts. Must not sleep,
 					* must not fail */
 
-/* Used for CPU hotplug events occuring while tasks are frozen due to a suspend
+/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
  * operation in progress
  */
 #define CPU_TASKS_FROZEN	0x0010