3.16.85-60101-nas5xx

Stable legacy kernel for Zyxel NAS5xx series

• Revert "ARM: remove HAVE_IRQ_TIME_ACCOUNTING and IRQ_FORCED_THREADING"
• Revert "ata: downgrade to v3.2"
• ata: update from v3.2 (minimal hardware-specific changes)
• pfe: control hfe_clock

Debian/Ubuntu packages:
Zyxel NAS520/NAS540/NAS542
https://seafile.servator.de/nas/zyxel/kernel/linux-image-3.16.85-20231212-nas5xx-armhf.zip

Build scripts:
https://seafile.servator.de/sbc/odroid/build/next/linux-3.16-sbc-build.tar.gz