PAC for the foboot peripherals

SVD is generated from https://github.com/im-tomu/foboot, with lxsocdoc updated to the current version:

$ cd hw
hw$ cd deps/lxsocdoc
hw/deps/lxsocdoc$ git pull
[..]
hw/deps/lxsocdoc$ cd ../../
hw$ python3 foboot-bitstream.py --document-only

You can now replace the current svd file with the one under hw/build/software/Fomu.svd and regenerate the rust code with:

$ sh generate.sh

You need svd2rust & form for this to work.