MEM_AP: Made legacy ROM base logic more clear.
MEM_AP: Made legacy ROM base logic more clear.

mesheven/pyOCD,flit/pyOCD,mesheven/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,pyocd/pyOCD,flit/pyOCD,mbedmicro/pyOCD,pyocd/pyOCD,mbedmicro/pyOCD