fsmc-test: add flash scripts for HW0.30

Add flash scripts for OpenOCD and extended make flash command with
make flash-fc/make flash-uc to flash the two CPUs.
fsmc-test: Add new commands to read/write semaphore

Add new commands to read/write semaphore outputs.
fsmc-test: enable DP RAM interrupt
fsmc-test: add compelete memory test ([i]n/[o]ut-test)
fsmc-test: implemented interrupt logic, including read/writing of BUSY and INT GPIO
fsmc-test: command to clear RAM