Add dma350 AHB APB STREAM and trig

.gitmodules

flist/nanosoc.flist

makefile

nanosoc/nanosoc_regions/exp/verilog/nanosoc_region_exp.v

nanosoc/nanosoc_regions/sysio/verilog/nanosoc_region_sysio.v

nanosoc/nanosoc_subsystems/dma/verilog/nanosoc_ss_dma.v

...nosoc_subsystems/expansion/verilog/nanosoc_ss_expansion.v

...soc_subsystems/systemctrl/verilog/nanosoc_ss_systemctrl.v

nanosoc/nanosoc_system/verilog/nanosoc_system.v

verif/tb/verilog/nanosoc_tb.v