[PATCH] ppc64: Fix typo in time calculations

This fixes a typo in the div128_by_32 function used in the timekeeping
calculations on ppc64.  If you look at the code it's quite obvious
that we need (rb + c) rather than (rb + b).  The "b" is clearly just a
typo.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/time.c

@@ -870,7 +870,7 @@ void div128_by_32( unsigned long dividend_high, unsigned long dividend_low,
 	rb = ((ra + b) - (x * divisor)) << 32;
 
 	y = (rb + c)/divisor;
-	rc = ((rb + b) - (y * divisor)) << 32;
+	rc = ((rb + c) - (y * divisor)) << 32;
 
 	z = (rc + d)/divisor;