Do you have any systems that have /sys/firmware/devicetree/base/ibm,opal/diagnostics and can test this on?
You can use the 16.04 xenial proposed d-i, and boot that with 'apt-setup/proposed=true' extra kernel cmdline this will use hw-detect from xenial-proposed, and should have this issue resolved, and automatically detect /diagnostics and thus install opal-prd in the target systems.
@IBM
Do you have any systems that have /sys/firmware/ devicetree/ base/ibm, opal/diagnostic s and can test this on?
You can use the 16.04 xenial proposed d-i, and boot that with 'apt-setup/ proposed= true' extra kernel cmdline this will use hw-detect from xenial-proposed, and should have this issue resolved, and automatically detect /diagnostics and thus install opal-prd in the target systems.