staging: unisys: visorbus: renamed functions like bus_*_response to match driver namespace

Renamed functions bus_create_response() to visorbus_create_response()
and bus_destroy_response() to visorbus_destroy_response().

Signed-off-by: Sameer Wadgaonkar <sameer.wadgaonkar@unisys.com>
Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>