staging: unisys: Fix vmcallerinterface.h block comments

This patch fixes all the checkpatch Block comments use a trailing
*/ while keeping comments clean.

Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>