staging: lustre: ptlrpc: fix lproc_ptlrpc static declarations

This patch fixes the following sparse warnings:

drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:51:3:warning:
 symbol 'll_rpc_opcode_table' was not declared. Should it be static?
drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:142:3: warning:
 symbol 'll_eopcode_table' was not declared. Should it be static?
drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:178:12: warning:
 symbol 'll_eopcode2str' was not declared. Should it be static?
drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c:731:1: warning:
 symbol 'ptlrpc_lprocfs_svc_req_history_seek' was not declared. Should it be static?

Signed-off-by: Jon Bernard <jbernard@tuxion.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>