Commit 30e6399892276 ("mempool: support non-EAL thread") added the
capability for non-EAL threads to use the mempool library. This commit
removes the note indicating that the mempool library cannot be used safely
by non-EAL threads, and replaces it with a more up-to-date note.
Signed-off-by: Gage Eads <gage.eads@intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>