fs/ntfs3: Use swap() to improve code

Use the swap() macro to simplify the code and improve its readability.

Fixes the following Coccinelle/coccicheck warning reported by
swap.cocci:

  WARNING opportunity for swap()

Compile-tested only.
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

fs/ntfs3/lib/lzx_decompress.c

@@ -512,8 +512,7 @@ static int lzx_decompress_block(const struct lzx_decompressor *d,
 			 * the same code.  (For R0, the swap is a no-op.)
 			 */
 			match_offset = recent_offsets[offset_slot];
-			recent_offsets[offset_slot] = recent_offsets[0];
-			recent_offsets[0] = match_offset;
+			swap(recent_offsets[offset_slot], recent_offsets[0]);
 		} else {
 			/* Explicit offset  */