vme: add missing put_device() after device_register() fails

put_device() must be called after device_register() fails,
since device_register() always initializes the refcount
on the device structure.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>