drivers: staging: lustre: Fix "space prohibited between function name and open parenthesis" errors

Fix checkpatch.ph errors "space prohibited between function name and
open parenthesis" in socklnd.h

Signed-off-by: Adrien Descamps <adrien.descamps@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>