Convert loglevel-related kernel boot parameters to early_param

So we can use them for the early console like console=uart8250 or
earlycon=uart8250 or early_printk
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

init/main.c

@@ -238,22 +238,18 @@ EXPORT_SYMBOL(loops_per_jiffy);
 
 static int __init debug_kernel(char *str)
 {
-	if (*str)
-		return 0;
 	console_loglevel = 10;
-	return 1;
+	return 0;
 }
 
 static int __init quiet_kernel(char *str)
 {
-	if (*str)
-		return 0;
 	console_loglevel = 4;
-	return 1;
+	return 0;
 }
 
-__setup("debug", debug_kernel);
-__setup("quiet", quiet_kernel);
+early_param("debug", debug_kernel);
+early_param("quiet", quiet_kernel);
 
 static int __init loglevel(char *str)
 {
@@ -261,7 +257,7 @@ static int __init loglevel(char *str)
 	return 1;
 }
 
-__setup("loglevel=", loglevel);
+early_param("loglevel", loglevel);
 
 /*
  * Unknown boot options get handed to init, unless they look like