staging: unisys: visorbus: move deviceenabled/disabled store functions

Move the deviceenabled/devicedisabled store functions so that
function prototypes can be removed.

This caused us to move several of the structures farther
down in the file as well.
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>