Commit message update

QAT Gen4 firmware placeholders replaced by official firmware binaries

Addressed issue raised in already merged review:
https://reviews.freebsd.org/D34632

Fixed invalid executable rights

In D34632#791116, @markj wrote:

I suspect there is some memory leak, too. If I run KTLS tests (/usr/tests/sys/kern/ktls_test) in a loop and check output from vmstat -m | grep qat after each run, the number of allocations from qat_ocf grows steadily.