Fix sparse errors

apple_bce.h was using #pragma once, which is not acceptable by sparse

Author: AdityaGarg8

apple_bce.h

@@ -1,4 +1,5 @@
-#pragma once
+#ifndef APPLE_BCE_H
+#define APPLE_BCE_H
 
 #include <linux/pci.h>
 #include <linux/spinlock.h>
@@ -35,4 +36,6 @@ struct apple_bce_device {
     struct bce_vhci vhci;
 };
 
-extern struct apple_bce_device *global_bce;
+extern struct apple_bce_device *global_bce;
+
+#endif //APPLE_BCE_H