initial changes for CAN

soc/lib/config.vhd

soc/peripheral/peripherals.vhd

soc/testbench/can_demo_tb.vhd

soc/testbench/can_new_tb.vhd

soc/testbench/testdata/data_read.tdf

soc/testbench/testdata/data_send.tdf

soc/testbench/testdata/default_setup.tdf

soc/testbench/testdata/read_data0.tdf

soc/testbench/testdata/read_data1.tdf

soc/top/top.vhd

soc/top/top.xdc