All modification made by update_kernel.sh in a fresh clone without
existing toolchains.
Build-tested: bcm27xx/bcm2711, ipq806x/R7800,
Run-tested: ipq806x/R7800
No dmesg regressions, everything functional
Signed-off-by: John Audia <graysky@archlinux.us>
Also removes random module and switches to new bcm2711 thermal driver.
Boot tested on RPi 4B v1.1 4G.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>