[CPUFREQ] Fix documentation filename.

Spotted by Jeremy Fitzhardinge

arch/i386/kernel/cpu/cpufreq/Kconfig

@@ -11,7 +11,7 @@ config CPU_FREQ
 	  fly. This is a nice method to save battery power on notebooks,
 	  because the lower the clock speed, the less power the CPU consumes.
 
-	  For more information, take a look at linux/Documentation/cpufreq or
+	  For more information, take a look at linux/Documentation/cpu-freq or
 	  at <http://www.brodo.de/cpufreq/>
 
 	  If in doubt, say N.
@@ -38,7 +38,7 @@ config X86_ACPI_CPUFREQ
 	  This driver adds a CPUFreq driver which utilizes the ACPI
 	  Processor Performance States.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -63,7 +63,7 @@ config ELAN_CPUFREQ
 	  parameter: elanfreq=maxspeed (in kHz) or as module
 	  parameter "max_freq".
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -74,7 +74,7 @@ config X86_POWERNOW_K6
 	  This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
 	  AMD K6-3+ processors.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -84,7 +84,7 @@ config X86_POWERNOW_K7
 	help
 	  This adds the CPUFreq driver for mobile AMD K7 mobile processors.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -95,7 +95,7 @@ config X86_GX_SUSPMOD
 	 This add the CPUFreq driver for NatSemi Geode processors which
 	 support suspend modulation.
 
-	 For details, take a look at linux/Documentation/cpufreq.
+	 For details, take a look at linux/Documentation/cpu-freq.
 
 	 If in doubt, say N.
 
@@ -107,7 +107,7 @@ config X86_SPEEDSTEP
 	  (Coppermine), all mobile Intel Pentium III-M (Tulatin) and all
 	  mobile Intel Pentium 4 P4-Ms.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -118,7 +118,7 @@ config X86_P4_CLOCKMOD
 	  This adds the CPUFreq driver for Intel Pentium 4 / XEON
 	  processors.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -129,7 +129,7 @@ config X86_LONGRUN
 	  This adds the CPUFreq driver for Transmeta Crusoe processors which
 	  support LongRun.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.
 
@@ -141,7 +141,7 @@ config X86_LONGHAUL
 	  VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T 
 	  processors.
 
-	  For details, take a look at linux/Documentation/cpufreq. 
+	  For details, take a look at linux/Documentation/cpu-freq. 
 
 	  If in doubt, say N.