Change "useing" -> "using".

Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 6273fa9..7ef0c7b 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -94,7 +94,7 @@
 /*
  * initialize all of a work item in one go
  *
- * NOTE! No point in using "atomic_long_set()": useing a direct
+ * NOTE! No point in using "atomic_long_set()": using a direct
  * assignment of the work data initializer allows the compiler
  * to generate better code.
  */