tpm: selftest: cleanup after unseal with wrong auth/policy test

Unseal with wrong auth or wrong policy test affects DA lockout
and eventually causes the tests to fail with:
"ProtocolError: TPM_RC_LOCKOUT: rc=0x00000921"
when the tests run multiple times.
Send tpm clear command after the test to reset the DA counters.
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

tools/testing/selftests/tpm2/test_smoke.sh

@@ -3,3 +3,8 @@
 
 python -m unittest -v tpm2_tests.SmokeTest
 python -m unittest -v tpm2_tests.AsyncTest
+
+CLEAR_CMD=$(which tpm2_clear)
+if [ -n $CLEAR_CMD ]; then
+	tpm2_clear -T device
+fi