xen-console-srv: do not send esc exit char to guest

No need to send ESCAPE_CHARACTER Ctrl-'[' to guest domain, just return from
console_shell_cb().

Signed-off-by: Grygorii Strashko <[email protected]>
Reviewed-by: Volodymyr Babchuk <[email protected]>

xen-console-srv/src/xen_console.c

@@ -451,6 +451,7 @@ static void console_shell_cb(const struct shell *shell,
 		atomic_set_bit(&console->stop_thrd, INT_THREAD_STOP_BIT);
 		k_sem_give(&console->int_sem);
 		shell_set_bypass(shell, NULL);
+		return;
 	}
 
 	write_to_ext_ring(console->intf, data, len);