LU-6142 ptlrpc: Fix style issues for client.c

LU-6142 ptlrpc: Fix style issues for client.c

This patch fixes issues reported by checkpatch
for file lustre/ptlrpc/client.c

Test-Parameters: trivial
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I24c4412d8747292f71c28fc0e8fc48b1cea405b9
Reviewed-on: https://review.whamcloud.com/34803
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>