staging: unisys: visorbus: visorbus_main.c: made checkpatch warning-free

Made visorbus_main.c checkpatch warning-free by fixing the comment style
issues.

Signed-off-by: Gavin O'Leary <gavinoleary3@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>