staging: unisys: visorbus: my_device_create does not call device_epilog

Don't have my_device_create call device_epilog, have it call
chipset_device_create directly instead.

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>