If a driver calls tpm_dev_vendor_release for a device already released
then the driver will oops.
Signed-off-by: NAndi Shyti <andi.shyti@gmail.com>
Signed-off-by: NPeter Huewe <peterhuewe@gmx.de>
Signed-off-by: NRajiv Andrade <srajiv@linux.vnet.ibm.com>