47f69f4f2b
PowerPC kernels in r6 is actually metadata from loader(8) or gibberish left in r6, which is not required to be anything under the PAPR/ePAPR/CHRP/OF standards, by another boot loader. Note that, as a result, systems need a new boot loader to boot PPC kernels after this revision without ending up at a mountroot prompt. New boot loaders are backwards compatible and can boot older kernels. Reviewed by: jhibbits MFC after: 2 months