staging: unisys: visorbus: add error handling for chipset_device_create

Adds error handling to the chipset_device_create message. If it returns
a failure, it is assumed it has not signaled the s-Par firmware of the
failure and the caller must do that.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>