staging: unisys: fix vbuschannel.h comments

Fixes trailling */ from vbuschannel.h and alignment issue on the
same comment block

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>