Fix typo in arch/x86/kernel/tsc_32.c

Signed-off-by: Josh Triplett <josh@kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

arch/x86/kernel/tsc_32.c

@@ -74,7 +74,7 @@ EXPORT_SYMBOL_GPL(check_tsc_unstable);
  *	And since SC is a constant power of two, we can convert the div
  *  into a shift.
  *
- *  We can use khz divisor instead of mhz to keep a better percision, since
+ *  We can use khz divisor instead of mhz to keep a better precision, since
  *  cyc2ns_scale is limited to 10^6 * 2^10, which fits in 32 bits.
  *  (mathieu.desnoyers@polymtl.ca)
  *