boards: amd: kv260_r5: update the board cmake to use xsdb runner

Update the board cmake to use xsdb runner, If users would like to
use default xsdb.cfg then need to pass the fsbl.elf binary via
--fsbl option when using west flash or twister commands.

Usage:
1) west flash --runner xsdb --elf-file kv260_r5/zephyr/zephyr.elf
 --fsbl <path>/fsbl.elf
2) ./scripts/twister -p kv260_r5 --west-runner xsdb --device-testing
 --device-serial /dev/ttyUSB0 --west-flash="--fsbl=<path>/fsbl.elf"

Signed-off-by: Appana Durga Kedareswara rao <appana.durga.kedareswara.rao@amd.com>

boards/amd/kv260_r5/board.cmake

@@ -1,3 +1,4 @@
 # Copyright (c) 2022 Linaro.
 #
 # SPDX-License-Identifier: Apache-2.0
+include(${ZEPHYR_BASE}/boards/common/xsdb.board.cmake)

boards/amd/kv260_r5/support/xsdb.cfg

@@ -0,0 +1,24 @@
+# Copyright (c) 2024 Advanced Micro Devices, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+proc load_image args  {
+	set elf_file [lindex $args 0]
+	set fsblelf_file [lindex $args 1]
+	connect -url 127.0.0.1:3121
+	after 2000
+	targets -set -nocase -filter {name =~ "*R5*#0"}
+	rst -proc
+	dow $fsblelf_file
+	after 1000
+	con
+	after 1000
+	stop
+	targets -set -nocase -filter {name =~ "*R5*#0"}
+	after 2000
+	dow $elf_file
+	con
+	exit
+}
+
+load_image {*}$argv

boards/common/xsdb.board.cmake

@@ -0,0 +1,6 @@
+# Copyright (c) 2024 Advanced Micro Devices, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+board_set_debugger_ifnset(xsdb)
+board_set_flasher_ifnset(xsdb)
+board_finalize_runner_args(xsdb)