board/ti_*.cfg: Move TI evm platform configurations to board/ti folder

As part of the cfg file cleanups, let us move the TI evms, launchpads
and other development platform configuration files to board/ti folder.

While at this, drop the "ti_" prefix as the folder structure gives us
the details anyways.

Change-Id: I929b88e0cf6527f3181820ad0b9b4744185eabaf
Suggested-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9205
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

tcl/board/ti/tmdx570ls20susb.cfg

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# TMS570 Microcontroller USB Kit
+# http://www.ti.com/tool/TMDX570LS20SUSB
+
+# Board uses a FT2232H to emulate an XDS100v2 JTAG debugger
+# TODO: board also supports an SCI UART on the 2232's B Bus
+source [find interface/ftdi/xds100v2.cfg]
+
+# Processor is TMS570LS20216
+source [find target/ti/tms570ls20xxx.cfg]
+
+reset_config trst_only
+
+# xds100v2 config says add this to the end
+init
+ftdi set_signal PWR_RST 1
+jtag arp_init