All of amd64, arm64, i386, powerpc and riscvarchitectures enable NEW_PCIB in DEFAULTS, (arm being the most recent
leaving just arm (which still enables it for GENERIC and TEGRA124) and mipsto do so in 121be555997b (arm: Set NEW_PCIB in DEFAULTS rather than a
(which still enables it for RT2880_FDT and various std.mediatek-using kernelsubset of kernel configs"), so it's time we removed the legacy code that
configs), so it's time they caught upno longer sees much testing and we removed the legacy code that no
longer sees much testinghas a significant maintenance burden.