staging: unisys: visorbus: merging the visorbus_*_response functions into one.

The functions visorbus_create_response(), visorbus_destroy_response(),
viosrbus_device_create_response(), viosrbus_device_destroy_response()
are all functionally similar. Merging these four functions into a
single function called visorbus_response().

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
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>