kernel: bump 5.4 to 5.4.74

kernel: bump 5.4 to 5.4.74

Removed upstreamed patches:
 mvebu/patches-5.4
   409-phy-marvell-comphy-Convert-internal-SMCC-firmware-re.patch

All modifications made by update_kernel.sh

Build system: x86_64
Build-tested: ipq806x/R7800, ath79/generic, bcm27xx/bcm2711, x86_64
Run-tested: ipq806x/R7800, x86_64, lantiq/Easybox 904 xDSL

No dmesg regressions, everything functional

Signed-off-by: John Audia <graysky@archlinux.us>
Tested-by: Curtis Deptuck <curtdept@me.com> [x86_64 build/run]
[added lantiq test report]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>