Merge pull request #399 from mithro/litex-sm2py

Converting LiteX to use Python modules.

diff --cc litex/soc/cores/cpu/blackparrot/core.py
Simple merge

diff --cc litex/soc/cores/cpu/lm32/core.py
Simple merge

diff --cc litex/soc/cores/cpu/microwatt/core.py
Simple merge

diff --cc litex/soc/cores/cpu/mor1kx/core.py
Simple merge

diff --cc litex/soc/cores/cpu/picorv32/core.py
Simple merge

diff --cc litex/soc/cores/cpu/rocket/core.py
Simple merge

diff --cc litex/soc/cores/cpu/vexriscv/core.py
Simple merge