Change since V1:

- Add test results with LTP.
- Rewrite patch 1's commit header.

Here is the test result with LTP testcase ima_tpm.sh which is used
to verify binary_bios_measurements.

ima_tpm 1 TINFO: timeout per run is 0h 5m 0s
ima_tpm 1 TINFO: /proc/cmdline: BOOT_IMAGE=/boot/vmlinuz-5.0.0-rc1+ root=UUID=c665e92c-736d-4b08-9143-a57396f935f3 ro rootwait crashkernel=auto console=tty0 console=ttyS0,115200 reboot=efi ima_hash=sha1
ima_tpm 1 TINFO: verify boot aggregate
ima_tpm 1 TPASS: bios aggregate matches IMA boot aggregate
ima_tpm 2 TINFO: verify PCR values
ima_tpm 2 TINFO: evmctl version: evmctl 1.1
ima_tpm 2 TCONF: TPM Hardware Support not enabled in kernel or no TPM chip found

Summary:
passed   1
failed   0   
skipped  1   
warnings 0

Note:
The 2nd test in ima_tpm requires /sys/class/tpm/tpm0/device/pcrs but this
interface is not available if TPM2 device used. So the test result showed
above is expected.

Jia