staging: unisys: virtpci: Add a blank line after the definition of driver_private

Insert a blank line between the definition of the driver_private structure and the next statement.

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