End of the road for PowerPC 40x in Linux

The original PowerPC 400-series embedded chips are no longer supported in the Linux kernel as of today. Despite its prior design wins in many set top boxes, service processors and network equipment, there are no known current consumers of the code and no maintainers. The change affects the 401, 403 and 405, but in case you were worried the change is irrelevant to the embedded PowerPC 405 variant used as an on-chip controller for OpenPOWER, since it runs the Self-Boot Engine and not mainline Linux. It also does not extend to the 44x and above, like the Amiga clone Sam440ep and Sam460ex (AmigaOne 500) boards, which use the AMCC 440EP and 440-derived AMCC 460EX respectively and thus remain supported.