staging: lustre: uapi: label lustre_cfg.h as an uapi header

Change LUSTRE_CFG_H to _UAPI_LUSTRE_CFG_H_ now that it is
a proper UAPI header.
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6401
Reviewed-on: https://review.whamcloud.com/26966Reviewed-by: Quentin Bouget <quentin.bouget@cea.fr>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/include/uapi/linux/lustre/lustre_cfg.h

@@ -30,8 +30,8 @@
  * Lustre is a trademark of Sun Microsystems, Inc.
  */
 
-#ifndef _LUSTRE_CFG_H
-#define _LUSTRE_CFG_H
+#ifndef _UAPI_LUSTRE_CFG_H_
+#define _UAPI_LUSTRE_CFG_H_
 
 #include <linux/errno.h>
 #include <linux/kernel.h>
@@ -258,4 +258,4 @@ static inline int lustre_cfg_sanity_check(void *buf, size_t len)
 
 /** @} cfg */
 
-#endif /* _LUSTRE_CFG_H */
+#endif /* _UAPI_LUSTRE_CFG_H_ */