kernel: bump 5.4 to 5.4.98

kernel: bump 5.4 to 5.4.98

Ran update_kernel.sh in a fresh clone without any existing toolchains.
No manual changes needed.

Build system:       x86_64
Build-tested:       bcm27xx/bcm2711, ipq806x/R7800
Run-tested:         ipq806x/R7800
Compile-tested [*]: ath79/{generic,tiny}, ipq40xx, octeon, realtek,
                    ramips/{mt7620,mt7621}, x86/64
Run-tested [*]:     ath79/{generic,tiny}: WNDR3700v2 / TL-WR841N v7
                    octeon: EdgeRouter Lite
                    ramips/{mt7620,mt7621}: Archer C2 v1 / DIR-878 A1,
                                      EAP235-Wall, R6800, RT-AC57U v1

No dmesg regressions, everything functional

Signed-off-by: John Audia <graysky@archlinux.us>
Tested-by: Stijn Segers <foss@volatilesystems.org> [*]