Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index bc61946..4742090 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -35,7 +35,7 @@
 	 * do the disable, re-program, enable sequence.
 	 * This is *not* particularly important for level triggered
 	 * but in a edge trigger case, we might be setting rte
-	 * when an active trigger is comming in. This could
+	 * when an active trigger is coming in. This could
 	 * cause some ioapics to mal-function.
 	 * Being paranoid i guess!
 	 *