bootconfig: Fix kernel message mentioning CONFIG_BOOT_CONFIG

Fix up one typo: CONFIG_BOOTCONFIG -> CONFIG_BOOT_CONFIG

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

init/main.c

@@ -467,7 +467,7 @@ static void __init setup_boot_config(const char *cmdline)
 
 static int __init warn_bootconfig(char *str)
 {
-	pr_warn("WARNING: 'bootconfig' found on the kernel command line but CONFIG_BOOTCONFIG is not set.\n");
+	pr_warn("WARNING: 'bootconfig' found on the kernel command line but CONFIG_BOOT_CONFIG is not set.\n");
 	return 0;
 }
 early_param("bootconfig", warn_bootconfig);