Backport 2 patches that provide the facility for dumping firmware information.
c7e64b9ce04aa2e3fad7396d92b5cb92056d16ac - powerpc/powernv Platform dump interface 774fea1a38c6a5a8ccc10969db84da24565f276f - powerpc/powernv: Read OPAL error log and export it through sysfs
Backport 2 patches that provide the facility for dumping firmware information.
c7e64b9ce04aa2e 3fad7396d92b5cb 92056d16ac - powerpc/powernv Platform dump interface 8ccc10969db84da 24565f276f - powerpc/powernv: Read OPAL error log and export it through sysfs
774fea1a38c6a5a