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

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

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

Change-Id: I45fc242eccf17c33b2fa938e401f1a581b2b53ac
Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Reviewed-on: https://review.whamcloud.com/33602
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>