* kernel: bump 5.4 to 5.4.79

* ramips: add mt7620-nand driver for NAND flash

This add the mt7620-nand driver
and enable nand ubifs for subtarget mt7620
Signed-off-by: NChen Minqiang <ptpt52@gmail.com>
Co-authored-by: NChen Minqiang <ptpt52@gmail.com>

[mac80211]
 5b29614 mac80211: another fix for the sta connection monitor
 1ed6eb1 mac80211: backport sched_set_fifo_low
 cba4120 mac80211: add support for specifying a per-device scan list
 e0d482f rt2x00: mt7620: differentiate based on SoC's CHIP_VER

[package]
 amd64-microcode/intel-microcode/linux-firmware: update version