debug: turn ignore_loglevel into an early param

i was debugging early crashes and wondered where all the printks
went. The reason: ignore_loglevel_setup() was not called yet ...
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/printk.c

@@ -455,10 +455,10 @@ static int __init ignore_loglevel_setup(char *str)
 	ignore_loglevel = 1;
 	printk(KERN_INFO "debug: ignoring loglevel setting.\n");
 
-	return 1;
+	return 0;
 }
 
-__setup("ignore_loglevel", ignore_loglevel_setup);
+early_param("ignore_loglevel", ignore_loglevel_setup);
 
 /*
  * Write out chars from start to end - 1 inclusive