Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 0baa1bb..0e0e0cc 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -43,7 +43,7 @@
 {
 #ifdef CONFIG_ACPI
 	/*
-	 * If CPEI can be re-targetted or if this is not
+	 * If CPEI can be re-targeted or if this is not
 	 * CPEI target, then it is hotpluggable
 	 */
 	if (can_cpei_retarget() || !is_cpu_cpei_target(num))