nilfs2: fix white space issue in nilfs_mount()

Fix the following checkpatch.pl error and warnings:

  ERROR: code indent should use tabs where possible
  #1317: FILE: super.c:1317:
  + ^I^Is_new = true;$

  WARNING: please, no space before tabs
  #1317: FILE: super.c:1317:
  + ^I^Is_new = true;$

  WARNING: please, no spaces at the start of a line
  #1317: FILE: super.c:1317:
  + ^I^Is_new = true;$

Link: http://lkml.kernel.org/r/1461935747-10380-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 7f5d3d9..e05d184 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1316,7 +1316,7 @@
 	}
 
 	if (!s->s_root) {
- 		s_new = true;
+		s_new = true;
 
 		/* New superblock instance created */
 		s->s_mode = mode;