board/ti: Rename _swd_native.cfg as -self-hosted.cfg

Rename the _swd_native.cfg files as -self-hosted.cfg files as a better
representation of what we are using the configuration files to be.

Change-Id: I4eb469a219b83de6a9e7a8dfef5607306f59a7cd
Suggested-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9206
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins

tcl/board/ti/j721e-self-hosted.cfg

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2022-2023 Texas Instruments Incorporated - http://www.ti.com/
+#
+# Texas Instruments TDA4VM/J721E
+# Link: https://www.ti.com/product/TDA4VM
+#
+# This configuration file is used as a self hosted debug configuration that
+# works on every TDA4VM platform based on firewall configuration permitted
+# in the system.
+#
+# In this system openOCD runs on one of the CPUs inside TDA4VM and provides
+# network ports that can then be used to debug the microcontrollers on the
+# SoC - either self hosted IDE OR remotely.
+
+# We are using dmem, which uses dapdirect_swd transport
+adapter driver dmem
+transport select swd
+
+if { ![info exists SOC] } {
+        set SOC j721e
+}
+source [find target/ti/k3.cfg]