staging: unisys: visorbus move visorbus_type to remove prototypes

Move the struct visorbus_type down in the file to get rid of
the function prototypes visorbus_uevent and visorbus_match.

Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>