qemu-loongarch64 is present in Desktop versions but not registered with binfmt

[am11]

The VM image has qemu-loongarch64, but it is not registered per https://docs.kernel.org/admin-guide/binfmt-misc.html.

% docker run --rm --privileged --pid=host debian nsenter -t 1 -m -u -n -i which qemu-loongarch64
/usr/bin/qemu-loongarch64

but corresponding binfmt entry doesn't exist /proc/sys/fs/binfmt_misc/loongarch64; in that location, we have others such as:

% docker run --rm --privileged --pid=host debian nsenter -t 1 -m -u -n -i cat /proc/sys/fs/binfmt_misc/riscv64    
enabled
interpreter /usr/bin/qemu-riscv64
flags: POCF
offset 0
magic 7f454c460201010000000000000000000200f300
mask ffffffffffffff00fffffffffffffffffeffffff