[CPUFREQ] fix configuration help message

cpufreq support can't be built as a module. Fix the related configuration
help message.
Signed-off-by: NStefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: NDave Jones <davej@redhat.com>

drivers/cpufreq/Kconfig

@@ -9,9 +9,6 @@ config CPU_FREQ
 	  clock speed, you need to either enable a dynamic cpufreq governor
 	  (see below) after boot, or use a userspace tool.
 
-	  To compile this driver as a module, choose M here: the
-	  module will be called cpufreq.
-
 	  For details, take a look at <file:Documentation/cpu-freq>.
 
 	  If in doubt, say N.