SW reset signals for mock-turtle CPUs
Add signals for resetting the mock-turtle cores from the GW.
Signals should perform the same functions as host commands:
echo 1 > /sys/class/mockturtle/trtl-0004-01/reset
echo 0 > /sys/class/mockturtle/trtl-0004-00/reset
It should resets the program counter, but not clear the whole RAM.
MT_CPU_CSR_REG_RESET