staging: vc04_services: Fix "space prohibited"

This patch fixes the checkpatch.pl error:

ERROR: space prohibited after/before that open/closed parenthesis

in the interface/vchi directory.

Signed-off-by: Aymen Qader <qader.aymen@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>