LU-3103 obdclass: Remove EXPORT_SYMBOL on static function

LU-3103 obdclass: Remove EXPORT_SYMBOL on static function

In LU-2912 commit 7e915f5d7177b22bd3cc800137fb505781a2c037,
the function linkea_entry_pack() was accidentally delared static
and then also explicitly exported with EXPORT_SYMBOL.  On ppc64
gcc balks at this conflict.

linkea_entry_pack() is not declared in lustre_linkea.h, so leave
it static and remove the EXPORT_SYMBOL.

Change-Id: I60093fc3da8b82e51530ed93427e5ee8d8e6745d
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/5939
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Minh Diep <minh.diep@intel.com>
Reviewed-by: John Hammond <johnlockwoodhammond@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>