Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/kernel/cpu.c b/kernel/cpu.c
index c95fc4d..12b7458 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -126,7 +126,7 @@
 #else /* #if CONFIG_HOTPLUG_CPU */
 static void cpu_hotplug_begin(void) {}
 static void cpu_hotplug_done(void) {}
-#endif	/* #esle #if CONFIG_HOTPLUG_CPU */
+#endif	/* #else #if CONFIG_HOTPLUG_CPU */
 
 /* Need to know about CPUs going up/down? */
 int __ref register_cpu_notifier(struct notifier_block *nb)