xfs: move xfs_log_dinode_to_disk to the log recovery code

xfs: move xfs_log_dinode_to_disk to the log recovery code

Source kernel commit: 88947ea0ba713c9b74b212755b3b58242f0e7a56

Move this function to xfs_inode_item_recover.c since there's only one
caller of it.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>