kconfig: shell: experimental settings now uses select EXPERIMENTAL

With the introduction of `EXPERIMENTAL` and `WARN_EXPERIMENTAL` in
Zephyr all subsys/shell settings having `[EXPERIMENTAL]` in their
prompt has has been updated to include `select EXPERIMENTAL` so that
developers can enable warnings when experimental features are enabled.

Signed-off-by: Torsten Rasmussen <[email protected]>

Author: tejlmand

subsys/shell/Kconfig.backends

@@ -230,7 +230,8 @@ config SHELL_TELNET_SEND_TIMEOUT
 	  in when a line buffer is not empty but did not yet meet the line feed.
 
 config SHELL_TELNET_SUPPORT_COMMAND
-	bool "Add support for telnet commands (IAC) [Experimental]"
+	bool "Add support for telnet commands (IAC) [EXPERIMENTAL]"
+	select EXPERIMENTAL
 	help
 	  Current support is so limited it's not interesting to enable it.
 	  However, if proven to be needed at some point, it will be possible