windows: Rename init_windows to windows_init

Change-Id: Icdee1694b230d3c03075b840ec31450a236ab9e1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/mboxd.c b/mboxd.c
index 2e9f10f..0baa1ce 100644
--- a/mboxd.c
+++ b/mboxd.c
@@ -364,7 +364,7 @@
 	}
 
 	/* We've found the reserved memory region -> we can assign to windows */
-	rc = init_windows(context);
+	rc = windows_init(context);
 	if (rc) {
 		goto finish;
 	}