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

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

Renamed functions
* chipset_bus_create() to visorchipset_bus_create()
* chipset_bus_destroy() to visorchipset_bus_destroy()

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>