some TPM related files are missing in sysfs when enable passthrough TPM
Description of problem:
When enable passthrough TPM, there are some files in sysfs are missing, like description, uid file.
under the host linux, we have those file in it:
root@intel-x86-64:/sys/class/tpm/tpm0/device/firmware_node# cat description 
TPM 2.0 Device
root@intel-x86-64:/sys/class/tpm/tpm0/device/firmware_node# cat uid 
1
Steps to reproduce:
after boot into system, check sysfs, there is no description and uid file in /sys/class/tpm/tpm0/device/firmware_node