fs/xfs: Fix typos in comments

Delete duplicate word "the"

[chandan: Fix mangled patch]
Signed-off-by: Zizhen Pang <pangzizhen001@208suo.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>