cpufreq-interactive: Compile fixup

Looks like AOSP has a compile bug. Fix it up.

Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index 62c6da1..7953d59 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -232,7 +232,7 @@
 	 * floor frequency for the minimum sample time since last validated.
 	 */
 	if (new_freq < pcpu->floor_freq) {
-		if (pcpu->timer_run_time - pcpu->target_validate_time
+		if (pcpu->timer_run_time - pcpu->floor_validate_time
 		    < min_sample_time) {
 			trace_cpufreq_interactive_notyet(data, cpu_load,
 					 pcpu->target_freq, new_freq);