move unused files to old directory

diff --git a/trb_net16_endpoint_0_trg_1_api.vhd b/oldfiles/trb_net16_endpoint_0_trg_1_api.vhd
similarity index 100%
rename from trb_net16_endpoint_0_trg_1_api.vhd
rename to oldfiles/trb_net16_endpoint_0_trg_1_api.vhd

diff --git a/trb_net16_hub_logic.vhd b/oldfiles/trb_net16_hub_logic.vhd
similarity index 100%
rename from trb_net16_hub_logic.vhd
rename to oldfiles/trb_net16_hub_logic.vhd

diff --git a/trb_net16_ibuf2.vhd b/oldfiles/trb_net16_ibuf2.vhd
similarity index 100%
rename from trb_net16_ibuf2.vhd
rename to oldfiles/trb_net16_ibuf2.vhd

diff --git a/trb_net16_regIO_2.vhd b/oldfiles/trb_net16_regIO_2.vhd
similarity index 100%
rename from trb_net16_regIO_2.vhd
rename to oldfiles/trb_net16_regIO_2.vhd