cpufreq: Kconfig: Fix spelling errors

Fix 4 spelling errors in help sections.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
index d369349..89ae88f 100644
--- a/drivers/cpufreq/Kconfig.x86
+++ b/drivers/cpufreq/Kconfig.x86
@@ -10,7 +10,7 @@
 	  The driver implements an internal governor and will become
           the scaling driver and governor for Sandy bridge processors.
 
-	  When this driver is enabled it will become the perferred
+	  When this driver is enabled it will become the preferred
           scaling driver for Sandy bridge processors.
 
 	  If in doubt, say N.
@@ -52,7 +52,7 @@
 	help
 	  The powernow-k8 driver used to provide a sysfs knob called "cpb"
 	  to disable the Core Performance Boosting feature of AMD CPUs. This
-	  file has now been superseeded by the more generic "boost" entry.
+	  file has now been superseded by the more generic "boost" entry.
 
 	  By enabling this option the acpi_cpufreq driver provides the old
 	  entry in addition to the new boost ones, for compatibility reasons.