Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c
index 7a576092..40ee7e5 100644
--- a/arch/arm/kernel/swp_emulate.c
+++ b/arch/arm/kernel/swp_emulate.c
@@ -158,7 +158,7 @@
 
 	if (res == 0) {
 		/*
-		 * Barrier also required between aquiring a lock for a
+		 * Barrier also required between acquiring a lock for a
 		 * protected resource and accessing the resource. Inserted for
 		 * same reason as above.
 		 */