RTL: Distributed memory with extra memory
System-SW: Mainmem tile and size
Tbench: Verilator 2x2 CCCM system
RTL: correct reset signal
Tbenches: Set mainmem information properly
Systems: Complete missing system descriptions
RTL: Add global memory size and tile

The global memory tile size can now be read from 0xe000001c and the
tile id from 0xe0000020 if the size is greater 0.
System-SW: Bootcode generator for Boot-ROM
RTL: Bootrom code update
RTL: Add register for local memory size

The size of the local memory can now be read via register 0x24 in the
network adapter.
Tbenches: Increase memory size of tb_compute_tile