snippets: nrf70: Add debugging support

This snippet can be used to enable necessary features for nRF70
debugging. Rather than keeping this file in a single sample or copying
across all, moving to snippet is quite handy.

Also, add the missing license header.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

Author: krish2718

CODEOWNERS

@@ -205,6 +205,7 @@ Kconfig*                                  @tejlmand
 /share/ncs-package/                       @tejlmand
 /snippets/nrf91-modem-trace-uart/         @eivindj-nordic
 /snippets/tfm-enable-share-uart/          @nrfconnect/ncs-cia
+/snippets/nrf70-debug/                    @krish2718 @sachinthegreen
 /subsys/audio_module/                     @koffes @alexsven @erikrobstad @rick1082 @gWacey
 /subsys/bluetooth/                        @alwa-nordic @jori-nordic @carlescufi @KAGA164
 /subsys/bluetooth/mesh/                   @ludvigsj

samples/wifi/shell/sample.yaml

@@ -187,7 +187,8 @@ tests:
   sample.nrf7002.superset.debug:
     build_only: true
     extra_args:
-      OVERLAY_CONFIG=overlay-debug.conf;overlay-zperf.conf
+      SNIPPET=nrf70-debug
+      OVERLAY_CONFIG=overlay-zperf.conf
       CONFIG_NRF700X_UTIL=y
       CONFIG_WPA_CLI=y
       CONFIG_NET_IPV4_FRAGMENT=y

samples/wifi/shell/overlay-debug.conf snippets/nrf70-debug/overlay-debug.conf

@@ -1,3 +1,9 @@
+#
+# Copyright (c) 2023 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
 CONFIG_SHELL=y
 CONFIG_SHELL_STACK_SIZE=4096
 CONFIG_NET_SHELL=y

snippets/nrf70-debug/snippet.yml

@@ -0,0 +1,3 @@
+name: nrf70-debug
+append:
+  EXTRA_CONF_FILE: overlay-debug.conf