[PATCH] increase max LOG_BUF_SHIFT value

We've run into problems at 512p with the kernel log buffer wrapping and
overwriting some of the early boot output.  This is with a
CONFIG_LOG_BUF_SHIFT value of 20 (1MB).  The patch below just bumps the max
possible setting to 21 (2MB).
Signed-off-by: Greg Edwards <edwardsg@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

init/Kconfig

@@ -176,7 +176,7 @@ config AUDITSYSCALL
 
 config LOG_BUF_SHIFT
 	int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" if DEBUG_KERNEL
-	range 12 20
+	range 12 21
 	default 17 if ARCH_S390
 	default 16 if X86_NUMAQ || IA64
 	default 15 if SMP