[CPUFREQ] compile fix

Compile fix for speedstep-ich.c: missing forward declaration.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.de>
Signed-off-by: Dave Jones <davej@redhat.com>

arch/i386/kernel/cpu/cpufreq/speedstep-ich.c

@@ -64,6 +64,8 @@ static struct cpufreq_frequency_table speedstep_freqs[] = {
 #endif
 
 
+static unsigned int speedstep_get(unsigned int cpu);
+
 /**
  * speedstep_set_state - set the SpeedStep state
  * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH)