xfs: fix max_retries _show and _store functions

xfs: fix max_retries _show and _store functions

max_retries _show and _store functions should test against cfg->max_retries,
not cfg->retry_timeout

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
(cherry picked from commit ff97f2399edac1e0fb3fa7851d5fbcbdf04717cf)

Orabug: 26130728

Signed-off-by: Kirtikar Kashyap <kirtikar.kashyap@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>