Merge pull request #221 from achingupta/ag/tf-issues#272

Precede a 'sev' with a 'dsb' in bakery lock code
diff --git a/lib/locks/bakery/bakery_lock.c b/lib/locks/bakery/bakery_lock.c
index 877f526..7e71dec 100644
--- a/lib/locks/bakery/bakery_lock.c
+++ b/lib/locks/bakery/bakery_lock.c
@@ -107,6 +107,7 @@
 	++my_ticket;
 	bakery->number[me] = my_ticket;
 	bakery->entering[me] = 0;
+	dsb();
 	sev();
 
 	return my_ticket;
@@ -189,5 +190,6 @@
 	 */
 	bakery->owner = NO_OWNER;
 	bakery->number[me] = 0;
+	dsb();
 	sev();
 }