staging: lustre: ldlm: Recalculate interval in ldlm_pool_recalc()

Instead of rechecking a static value, recalculate to see if pool stats
need to be updated.
Add newline so message will print instead of warning about missing
newline.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4536
Reviewed-on: http://review.whamcloud.com/12547


Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>