windows: Rename free_windows to windows_free

Change-Id: Ifd9edb499069b6b7df48155aa2c8e955426751a5
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/windows.c b/windows.c
index c14386c..921e06f 100644
--- a/windows.c
+++ b/windows.c
@@ -121,10 +121,10 @@
 }
 
 /*
- * free_windows() - Free the window cache
+ * windows_free() - Free the window cache
  * @context:	The mbox context pointer
  */
-void free_windows(struct mbox_context *context)
+void windows_free(struct mbox_context *context)
 {
 	int i;