Avoid printing pointless tsc skew msgs.

[Dave Jones]

These messages are kinda silly..

CPU#0 had 0 usecs TSC skew, fixed it up.
CPU#1 had 0 usecs TSC skew, fixed it up.

inspired from: http://bugzilla.kernel.org/attachment.cgi?id=7713&action=view

Signed-off-by: Dave Jones <davej@xxxxxxxxxx>

--- linux-2.6.16.noarch/arch/i386/kernel/smpboot.c~	2006-03-29 18:49:23.000000000 -0500
+++ linux-2.6.16.noarch/arch/i386/kernel/smpboot.c	2006-03-29 18:50:35.000000000 -0500
@@ -313,7 +313,8 @@ static void __init synchronize_tsc_bp (v
 			if (tsc_values[i] < avg)
 				realdelta = -realdelta;
 
-			printk(KERN_INFO "CPU#%d had %ld usecs TSC skew, fixed it up.\n", i, realdelta);
+			if (realdelta > 0)
+				printk(KERN_INFO "CPU#%d had %ld usecs TSC skew, fixed it up.\n", i, realdelta);
 		}
 
 		sum += delta;
-
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