nilfs2: mark S_NOATIME on inodes only if NOATIME attribute is set

At present, nilfs marks S_NOATIME flag on all inodes.  This restricts
nilfs_set_inode_flags function so that it marks S_NOATIME only if a
given inode has an FS_NOATIME_FL flag.

Although nilfs does not support atime yet, touch_atime() still safely
returns on IS_NOATIME check since MS_NOATIME is always set on sb.
Signed-off-by: NRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

fs/nilfs2/inode.c

@@ -365,9 +365,7 @@ void nilfs_set_inode_flags(struct inode *inode)
 		inode->i_flags |= S_APPEND;
 	if (flags & FS_IMMUTABLE_FL)
 		inode->i_flags |= S_IMMUTABLE;
-#ifndef NILFS_ATIME_DISABLE
 	if (flags & FS_NOATIME_FL)
-#endif
 		inode->i_flags |= S_NOATIME;
 	if (flags & FS_DIRSYNC_FL)
 		inode->i_flags |= S_DIRSYNC;