selftests: tpm: Use 'test -e' instead of 'test -f'

'test -f' is suitable only for *regular* files. Use 'test -e' instead.

Cc: Nikita Sobolev <Nikita.Sobolev@synopsys.com>
Cc: linux-integrity@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Fixes: 5627f9cf ("Kernel selftests: Add check if TPM devices are supported")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/tpm2/test_smoke.sh

@@ -4,7 +4,7 @@
 # Kselftest framework requirement - SKIP code is 4.
 ksft_skip=4
 
-[ -f /dev/tpm0 ] || exit $ksft_skip
+[ -e /dev/tpm0 ] || exit $ksft_skip
 
 python -m unittest -v tpm2_tests.SmokeTest
 python -m unittest -v tpm2_tests.AsyncTest

tools/testing/selftests/tpm2/test_space.sh

@@ -4,6 +4,6 @@
 # Kselftest framework requirement - SKIP code is 4.
 ksft_skip=4
 
-[ -f /dev/tpmrm0 ] || exit $ksft_skip
+[ -e /dev/tpmrm0 ] || exit $ksft_skip
 
 python -m unittest -v tpm2_tests.SpaceTest