xfs_repair: reduce the amount of "clearing reflink flag" messages

xfs_repair: reduce the amount of "clearing reflink flag" messages

Clearing the reflink flag on files that don't share blocks is an
optimization, not a repair, so it's not critical to log a message every
single time we clear a flag.  Only log one message that we're clearing
these flags unless verbose mode is enabled.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>