Added config files.

tcl/board/sifive-e31arty-onboard-ftdi-raw.cfg

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+#
+# Be sure you include the speed and interface before this file
+# Example:
+# -c "adapter_khz 5000" -f "interface/ftdi/arty-onboard-ftdi.cfg" -f "board/sifive-e31arty-onboard-ftdi.cfg"
+
+set _CHIPNAME arty
+jtag newtap $_CHIPNAME bs -irlen 6 -expected-id 0x0362d093
+
+
+echo "Ready for Remote Connections"

tcl/board/sifive-e31arty-onboard-ftdi.cfg

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+#
+# Be sure you include the speed and interface before this file
+# Example:
+# -c "adapter_khz 5000" -f "interface/ftdi/arty-onboard-ftdi.cfg" -f "board/sifive-e31arty-onboard-ftdi.cfg"
+
+set _CHIPNAME riscv
+jtag newtap $_CHIPNAME cpu -irlen 6; # -expected-id 0x0362d093
+
+# Arrange for bscan tunneling mode to become active after the JTAG chain is verified (or has been reset but even if the full verification sequence wasn't perfect)
+jtag configure $_CHIPNAME.cpu -event setup {
+  ftdi_bscan_mode on
+}
+
+set _TARGETNAME $_CHIPNAME.cpu
+
+target create $_TARGETNAME.0 riscv -chain-position $_TARGETNAME
+$_TARGETNAME.0 configure -work-area-phys 0x80000000 -work-area-size 10000 -work-area-backup 1
+
+# Uncomment if hardware has flash
+# flash bank spi0 fespi 0x40000000 0 0 0 $_TARGETNAME.0 0x20004000
+init
+if {[ info exists pulse_srst]} {
+  ftdi_set_signal nSRST 0
+  ftdi_set_signal nSRST z
+}
+halt
+# Uncomment if hardware has flash
+# flash protect 0 64 last off
+echo "Ready for Remote Connections"

tcl/interface/ftdi/arty-onboard-ftdi.cfg

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+interface ftdi
+# ftdi_device_desc "Arty On-board FTDI interface"
+ftdi_vid_pid 0x0403 0x6010
+ftdi_channel 0
+ftdi_layout_init 0x0088 0x008b
+reset_config none
+