LU-6142 fld: Fix style issues for fld_handler.c

LU-6142 fld: Fix style issues for fld_handler.c

This patch fixes issues reported by checkpatch for file
lustre/fld/fld_handler.c

Change-Id: Ia546d6d6bf3387c656fbd138859710b834dd3a15
Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Reviewed-on: https://review.whamcloud.com/33600
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>