A few changes for the TPM subsystem wrt to EventLong creation and measurements.
Generally speaking it's insecure for a TPM to not cap all the active PCRs
when performing measurements.
Up to now we had code querying the active PCR banks on the fly and reason
whether it should perform a measurement or not. Since a TPM requires a reset
to change the active PCR banks, it's easier and faster to store them in an
array in the device private data and check against that.
This relates to an interesting feature some bootloaders have. For example
TF-A can't extend a PCR since it has no TPM drivers, but can produce an
EventLog that U-Boot can replay on the hardware once that comes up.
The supported hash algorithms of the TF-A generated Eventlog are generated
at compile time. When trying to replay an EventLog the TPM active PCR banks
and the created EventLog algorithms must agree. We used to report an error
but that changed in commit 97707f12fdab ("tpm: Support boot measurements").
This PR also brings up the old behavior and an error is reported now while
printing a human readable list of the mismatched algorithms.