windows: Rename init_windows to windows_init

Change-Id: Icdee1694b230d3c03075b840ec31450a236ab9e1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/windows.h b/windows.h
index c541c22..a1901c2 100644
--- a/windows.h
+++ b/windows.h
@@ -10,7 +10,7 @@
 #include "mbox.h"
 
 /* Initialisation Functions */
-int init_windows(struct mbox_context *context);
+int windows_init(struct mbox_context *context);
 void free_windows(struct mbox_context *context);
 /* Write From Window Functions */
 int write_from_window_v1(struct mbox_context *context,