Bug#977694: 5.10.4 Debian kernel does not boot on raspi 4 with ext4 rootfs and usb-msd

[Ryutaroh Matsumoto <ryutaroh@ict.e.titech.ac.jp>]

Control: reassign -1 raspi-firmware 1.20210111+ds-2

Booting linux kernel 5.10.x from USB MSD needs either
* loading reset-raspberrypi.ko in initramfs,
* or rebuild kernel with CONFIG_RESET_RASPBERRYPI=y in .config

Anyway, the combination of linux-image-arm64/sid and raspi-firmware/sid
does not allow booting RPi4 from USB-MSD.
Boot from USB-MSD was possible in Debian kernel 5.9 series.

I think this boot failure should be fixed by
echo reset-raspberrypi >/usr/share/initramfs-tools/modules.d/raspi-firmware.conf
instead of CONFIG_RESET_RASPBERRYPI=y.

If this is considered an issue in src:linux, please reassign this back.

Best regards, Ryutaroh Matsumoto