staging: unisys: delete extra space character in vbuschannel_itoa()

There's no need for that extra space in the typecast in
vbuschannel_itoa(), so just delete it.

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