fs/ntfs3: Add ifndef + define to all header files

Add guards so that compiler will only include header files once.
Signed-off-by: Kari Argillander <kari.argillander@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

fs/ntfs3/debug.h

@@ -7,6 +7,9 @@
  */
 
 // clang-format off
+#ifndef _LINUX_NTFS3_DEBUG_H
+#define _LINUX_NTFS3_DEBUG_H
+
 #ifndef Add2Ptr
 #define Add2Ptr(P, I)		((void *)((u8 *)(P) + (I)))
 #define PtrOffset(B, O)		((size_t)((size_t)(O) - (size_t)(B)))
@@ -61,4 +64,6 @@ void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
 #define ntfs_free(p)		kfree(p)
 #define ntfs_vfree(p)		kvfree(p)
 #define ntfs_memdup(src, len)	kmemdup(src, len, GFP_NOFS)
+
+#endif /* _LINUX_NTFS3_DEBUG_H */
 // clang-format on

fs/ntfs3/ntfs.h

@@ -7,6 +7,8 @@
  */
 
 // clang-format off
+#ifndef _LINUX_NTFS3_NTFS_H
+#define _LINUX_NTFS3_NTFS_H
 
 /* TODO:
  * - Check 4K mft record and 512 bytes cluster
@@ -1235,4 +1237,5 @@ struct SID {
 };
 static_assert(offsetof(struct SID, SubAuthority) == 8);
 
+#endif /* _LINUX_NTFS3_NTFS_H */
 // clang-format on

fs/ntfs3/ntfs_fs.h

@@ -6,6 +6,9 @@
  */
 
 // clang-format off
+#ifndef _LINUX_NTFS3_NTFS_FS_H
+#define _LINUX_NTFS3_NTFS_FS_H
+
 #define MINUS_ONE_T			((size_t)(-1))
 /* Biggest MFT / smallest cluster */
 #define MAXIMUM_BYTES_PER_MFT		4096
@@ -1085,3 +1088,5 @@ static inline void le64_sub_cpu(__le64 *var, u64 val)
 {
 	*var = cpu_to_le64(le64_to_cpu(*var) - val);
 }
+
+#endif /* _LINUX_NTFS3_NTFS_FS_H */