GFS2: fix sprintf format specifier

Sprintf format specifier "%d" and "%u" are mixed up in
gfs2_recovery_done() and freeze_show(). So correct them.

Signed-off-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>