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/am273_launchpad.cfg

@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/
+#
+# Texas Instruments AM273 Launchpad
+# https://www.ti.com/tool/LP-AM273
+#
+
+# AM273 Launchpad has an xds110 onboard.
+source [find interface/xds110.cfg]
+
+transport select jtag
+
+# default JTAG configuration has only SRST and no TRST
+reset_config srst_only srst_push_pull
+
+# delay after SRST goes inactive
+adapter srst delay 20
+
+if { ![info exists SOC] } {
+	set SOC am273
+}
+
+source [find target/ti/k3.cfg]
+
+adapter speed 250